I'm planning to go Graphene but realistically until a solid third option such as Linux phone is able to break the duopoly I dont think we can do much as I doubt devs will update or release many apps with little take up. Probably 90 - 95% of apps on my phone are FOSS derived from outside Play store.

This is only the start I'm afraid. "Big tech" has far, far too much leverage. Google are effectively censoring apps, they will no doubt cave in to any government asking who has (or hasnt) installed a particular app that at some future date is deemed unwelcome. Between this & ill conceived online ID schemes about to be forced upon populations, various minorities are about to be marginalised even further.

Very concerning times.