I use it on 3 machines, all is good. I find myself too comfortable with it to warrant another distro.
Void Linux
It has it's own package manager which is nice and performant, it has another script similar to the AUR to an extent, runit is simple and sensible.
It may be on the older side, but I've been using my Pixel 4A for three years or so, no complaints. I also use the headphone whenever possible. Also using GrapheneOS.
You may want to check out the Pixel 5A (also has a headphone jack if I'm not mistaken) for a bit of a newer phone, but the one I got used seems to have a band issue in which it would forcefully shut down after some time with my SIM card.
You may find that making your own desktop environment more your style, as opposed to relying on larger mainstream ones like KDE. For example, I was a GNOME guy until I dabbled with window managers like qtile, finally settling down with DWM currently with my own custom bar using slstatus.
If you are willing to try another distro, Void has been fantastic. My two main machines run Void very nicely for my needs, and it is very lightweight at barebones.