This is reason I don't use ios. I will be happy to use a new OS forked from android at this point of time. Any suggestions? I don't care where it originates from.

https://furilabs.com/

It runs a modified Debian and can run Android apps in containers. To my knowledge this is the closest we come to "open-source phone that actually works as a phone" today.

GrapheneOS, /e/OS, LineageOS

Ideally buy a phone with it pre-installed