I am daily driving my PinePhone Pro running manjaro (Plasma Mobile) for about a year now. I can say, it is definitely daily driveable with some exeptions/limitations:
The Battery life is horrible, like 3 h max usage from a battery. But since the batteries are cheap and can easily be swapped, I just have 4 of them to get through the day
The camera is working in the sense, that it can make pictures. If you want nice pictures, bring a separate camera
From time to time, cellular network connectivity drops out for short moments
Other than that it is pretty much functioning as a real phone. Of curse there are not that many apps. Telegram works natively and flawless, but whatsapp needs to be used via Whatsapp Web. For syncing all my documents and files I use nextcloud which works without any problems (once set up)
There is also the non Pro Version of the PinePhone, which is much slower, but has a better camera software and longer battery life (and is cheaper)