I have the PinePhone Beta Edition with Convergence Package and I tried all of the available OS alternatives, unfortunately none of those is quite ready for use as a daily driver.
Overall the best experience was with Mobian, this is actually pretty close to being a daily driver and if only performance was a bit better it could be OK (the new PinePhone Pro will be faster so I'm waiting to try Mobian with that).
Ubuntu Touch was the smoothest in terms of performance. The main disadvantage is I could not find some of the apps that are available for the other distros like Gnome Maps. Since it is based on Ubuntu I was expecting to find a larger app ecosystem compared to Mobian but that wasn't the case (I tried searching both in the store app and using apt search in terminal). Also, many apps in the store are actually repackaged progressive apps.
The default OS (Manjaro Plasma) is the least polished of all the ones I tried, it is quite a lot slower than Mobian or Ubuntu Touch and even basic things like placing an app on the home screen are broken, and I have no idea why they chose it as the default OS.