https://wccftech.com/play-store-apps-will-need-approval-from-google-for-background-location-access/

Over the years, Google has made it a lot harder for apps to access your phone's microphone, camera, location, etc. Android 10 took privacy to a whole new level by letting users determine how often an app had access to an individual element. However, an app could still have access to the said element at all times if the user allowed it. The software had checks and balances in place to ensure that an app running in the background couldn't access your microphone and camera. However, it can still access your location in the background, and that is set to change with Android 11. According to Google's blog post:

Now in Android 11, we’re giving users even more control with the ability to grant a temporary “one-time” permission to sensitive data like location. When users select this option, apps can only access the data until the user moves away from the app, and they must then request permission again for the next access.