I've forced myself into the habit of using mobile website versions and PWAs as much as possible. I've found multiple apps that seem to just be web views anyway. I've said for years that Google would eventually rug us FOSS people. They already did with the standard apps like gallery, messages, etc. I think we're approaching the time when we either fork off or give in. But as you said, even that won't solve for the proprietary services most apps are using now. Even some of our beloved apps (see Phoenix) still push Google Play Services for full functionality. That's a big reason I left Proton for Tuta. I want a Linux phone that will seemingly never work out. I'm tired of all the bullshit and these once productive devices are increasingly cage-like.