How to install Prime Video on a Mi Box S after Android 9 update?

Question

I have had a Mi Box S (MiBOX4) for about a year. It recently updated to Android 9 with the 5 March security patch. Until now I have been side loading the Prime Video app, but I saw that with Android 9, the Mi Box was supposed to support the Prime Video app natively. It does not show up in the app store, and when I search for it on a browser and try to remotely install it from the list of my connected Android Devices, it says the Mi Box is not compatible with the Android TV version of Prime Video.

What do I need to do to get my Mi Box 4 "compatible" with the Play Store version of the app? I'd like to be able to get regular automatic app updates, instead of having to manually side load updates all the time.

itsme113 · Accepted Answer

Its preloaded, you should see it under all apps or at the bottom list of preloaded apps.

alpuck596 · Answer

You wont find it in the store its preloaded but it doesnt update. You can use aptoide tv to update the app which happens frequently