Separate. Not entirely sure how it works but another user in thread brought it up, sec…

Skarn: Actually, no. e/OS includes MicroG, so even most app requiring Google services work just fine. What really doesnt’t work is Casting videos to a Chromecast, and anything requiting Play Integrity certification like Revolut.

Thought he provided more info, but yeah. Chromecast just does not function cause its basically in google walled garden.