As a fellow postmarketOS user, it's not fully ready for prime time, though it surely works.

If you need banking apps (not just bank in your browser), native popular messenger apps (Waydroid is there, but it's way from perfect) and stuff like such, postmarketOS and mobile Linux in general are still not ready for you.

If you want to explore the alternative and ready to make some sacrifices in a quest for independence, you should absolutely give it a spin. Many well-supported devices (Pixel 3a, Pocophone F1 etc. etc.) are old and extremely cheap to buy on the secondhand market, and will offer you a decent experience.