How to Enable Unknown Sources on Android 10
You can enable unknown sources on android 10 using the below settings.
Step 1: Swipe up from the bottom of the screen to access the app drawer.
Step 2: Tap the Settings app.
Step 3: Tap Apps & notifications.
Step 4: Tap Advanced.
Step 5: Tap Special app access.
Step 6: Tap Install unknown apps.
A list of apps is available (Show below given screenshot) such as Chrome, Adobe Acrobat, Gmail, Drive, and Google Go.
Step 7: Tap the app from a list.
By default turned off all apps toggle.
Step 8: Turn on Allow from this source toggle.
Now you can install apk file or third party apps from unknown sources in your running Android 10 or other devices.
Download and Install apk file on Android 10
Step 1: Open downloaded apk file on your phone.
This pop message appears: For your security, your phone is not allowed to install unknown apps from this source.
Step 2: Tap Settings.
Step 3: Turn on Allow from this source toggle to install apk file on your phone.
Step 4: Tap the Back button.
This message appears: Do you want to install this application?
Step 5: Tap Install.
Now the app is installing in your device.
Step 6: Tap Open.