Google Play store notifications
Google play will try to update the Google Play services which is not possible on a microG enabled device (i.e. AXP.OS or any other OS using microG instead of using the Google implementation).
There is no way to disable these checks other than to deactivate the Play store (or modify the closed source code) whenever not needed but what you can do instead is at least hide the notifications for these failed attempts.
find the notification in the drop down:
looong press the notification:
press the (i) or in newer Android versions the gears icon:
if you are not directly see the notification box but this instead then select "Notifications" there:
you should be redirected to the corresponding notification topic, deselect it and those notifications are gone:
