diff --git a/homeassistant/helpers/config_entry_flow.py b/homeassistant/helpers/config_entry_flow.py
index d349820978e..2b967286b95 100644
--- a/homeassistant/helpers/config_entry_flow.py
+++ b/homeassistant/helpers/config_entry_flow.py
@@ -5,8 +5,6 @@ from homeassistant import config_entries
 
 from .typing import HomeAssistantType
 
-# mypy: allow-untyped-defs, no-check-untyped-defs
-
 DiscoveryFunctionType = Callable[[], Union[Awaitable[bool], bool]]
 
 
diff --git a/homeassistant/helpers/entity_component.py b/homeassistant/helpers/entity_component.py
index e651d2e8cc7..e3dcbbc3c79 100644
--- a/homeassistant/helpers/entity_component.py
+++ b/homeassistant/helpers/entity_component.py
@@ -164,7 +164,7 @@ class EntityComponent:
             scan_interval=getattr(platform, "SCAN_INTERVAL", None),
         )
 
-        return await self._platforms[key].async_setup_entry(config_entry)  # type: ignore
+        return await self._platforms[key].async_setup_entry(config_entry)
 
     async def async_unload_entry(self, config_entry: ConfigEntry) -> bool:
         """Unload a config entry."""
diff --git a/homeassistant/helpers/entity_platform.py b/homeassistant/helpers/entity_platform.py
index 6d9a1275b06..90e3cdb2f4d 100644
--- a/homeassistant/helpers/entity_platform.py
+++ b/homeassistant/helpers/entity_platform.py
@@ -4,10 +4,17 @@ from contextvars import ContextVar
 from datetime import datetime, timedelta
 from logging import Logger
 from types import ModuleType
-from typing import TYPE_CHECKING, Dict, Iterable, List, Optional
+from typing import TYPE_CHECKING, Callable, Coroutine, Dict, Iterable, List, Optional
 
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import DEVICE_DEFAULT_NAME
-from homeassistant.core import CALLBACK_TYPE, callback, split_entity_id, valid_entity_id
+from homeassistant.core import (
+    CALLBACK_TYPE,
+    ServiceCall,
+    callback,
+    split_entity_id,
+    valid_entity_id,
+)
 from homeassistant.exceptions import HomeAssistantError, PlatformNotReady
 from homeassistant.helpers import config_validation as cv, service
 from homeassistant.helpers.typing import HomeAssistantType
@@ -19,7 +26,7 @@ from .event import async_call_later, async_track_time_interval
 if TYPE_CHECKING:
     from .entity import Entity
 
-# mypy: allow-untyped-defs, no-check-untyped-defs
+# mypy: allow-untyped-defs
 
 SLOW_SETUP_WARNING = 10
 SLOW_SETUP_MAX_WAIT = 60
@@ -53,7 +60,7 @@ class EntityPlatform:
         self.platform = platform
         self.scan_interval = scan_interval
         self.entity_namespace = entity_namespace
-        self.config_entry = None
+        self.config_entry: Optional[ConfigEntry] = None
         self.entities: Dict[str, Entity] = {}  # pylint: disable=used-before-assignment
         self._tasks: List[asyncio.Future] = []
         # Method to cancel the state change listener
@@ -119,10 +126,10 @@ class EntityPlatform:
             return
 
         @callback
-        def async_create_setup_task():
+        def async_create_setup_task() -> Coroutine:
             """Get task to set up platform."""
             if getattr(platform, "async_setup_platform", None):
-                return platform.async_setup_platform(
+                return platform.async_setup_platform(  # type: ignore
                     hass,
                     platform_config,
                     self._async_schedule_add_entities,
@@ -133,7 +140,7 @@ class EntityPlatform:
             # we don't want to track this task in case it blocks startup.
             return hass.loop.run_in_executor(
                 None,
-                platform.setup_platform,
+                platform.setup_platform,  # type: ignore
                 hass,
                 platform_config,
                 self._schedule_add_entities,
@@ -142,7 +149,7 @@ class EntityPlatform:
 
         await self._async_setup_platform(async_create_setup_task)
 
-    async def async_setup_entry(self, config_entry):
+    async def async_setup_entry(self, config_entry: ConfigEntry) -> bool:
         """Set up the platform from a config entry."""
         # Store it so that we can save config entry ID in entity registry
         self.config_entry = config_entry
@@ -151,13 +158,15 @@ class EntityPlatform:
         @callback
         def async_create_setup_task():
             """Get task to set up platform."""
-            return platform.async_setup_entry(
+            return platform.async_setup_entry(  # type: ignore
                 self.hass, config_entry, self._async_schedule_add_entities
             )
 
         return await self._async_setup_platform(async_create_setup_task)
 
-    async def _async_setup_platform(self, async_create_setup_task, tries=0):
+    async def _async_setup_platform(
+        self, async_create_setup_task: Callable[[], Coroutine], tries: int = 0
+    ) -> bool:
         """Set up a platform via config file or config entry.
 
         async_create_setup_task creates a coroutine that sets up platform.
@@ -340,7 +349,7 @@ class EntityPlatform:
                 return
 
         requested_entity_id = None
-        suggested_object_id = None
+        suggested_object_id: Optional[str] = None
 
         # Get entity_id from unique ID registration
         if entity.unique_id is not None:
@@ -354,7 +363,7 @@ class EntityPlatform:
                 suggested_object_id = f"{self.entity_namespace} {suggested_object_id}"
 
             if self.config_entry is not None:
-                config_entry_id = self.config_entry.entry_id
+                config_entry_id: Optional[str] = self.config_entry.entry_id
             else:
                 config_entry_id = None
 
@@ -512,7 +521,9 @@ class EntityPlatform:
             self._async_unsub_polling()
             self._async_unsub_polling = None
 
-    async def async_extract_from_service(self, service_call, expand_group=True):
+    async def async_extract_from_service(
+        self, service_call: ServiceCall, expand_group: bool = True
+    ) -> List["Entity"]:
         """Extract all known and available entities from a service call.
 
         Will return an empty list if entities specified but unknown.
@@ -535,9 +546,9 @@ class EntityPlatform:
         if isinstance(schema, dict):
             schema = cv.make_entity_service_schema(schema)
 
-        async def handle_service(call):
+        async def handle_service(call: ServiceCall) -> None:
             """Handle the service."""
-            await service.entity_service_call(
+            await service.entity_service_call(  # type: ignore
                 self.hass,
                 [
                     plf