That is correct, currently, moving to a linux phone will lose you more than what you’re losing with Google and Apple changes.
Apps are just part of the problem. Running a full linux OS on a phone with all the normal mobile phone capabilities is also an exercise in frustration. Taking Ubuntu Touch as an example, the OS has been around since 2011, was released in 2014 and it’s list of approved phones is still minuscule. If you’re a person on VZW, that list grows even smaller as VoLTE is problematic enough to be considered impossible to get working reliably.
I truly hope that the linux phone landscape shapes up but in it’s current form, it’s actually losing ground as it’s development is slower than the hardware development and at it’s current rate, will never be a viable option.
Thank you for the home.