I’m surprised nobody mentioned Droidian yet. It’s the best of both worlds: You get a Linux phone with Phosh and an actual camera + sensors working due to the Android kernel. Check it out here: https://droidian.org/
It supports Waydroid out of the box, allowing you to run Android apps such as Whatsapp, Bitwarden and even Google Playstore, etc.
The new Firefox is miles away from what PostmarketOS offers. The only downside is you need a supported device, as per https://devices.droidian.org/.
So yes, I do drive Droidian daily, but I have an Android phone nearby just in case I need something specific.