This is dumb. Nobody is going to go back to dumbphones. Europe should fund projects like PostmarketOS which provide a fully free OS for mobile phones.
UbuntuTouch may be a bit more usable right now but it too depends on Android.
If Europe funded PostmarketOS and funded the development of a Linux-first mobile phone it would do itself a great favor.
Fairphones are pretty well supported with PostmarketOS which is mainline Linux. Audio support being one big feature that is missing on all of them. Luca Weiss from Fairphone is working on mainline Linux patches for these devices. The Fairphone 6 booted with Linux support on the first day it was released (though still missing many drivers)
https://wiki.postmarketos.org/wiki/Category:Fairphone
I wish Fairphone would hire more People to work on Linux support