The logical replacement for Ubuntu is probably Debian. I have quite a lot of Ubuntu servers at work. I am quite seriously considering going upstream. I do like the LTS to LTS promise and that fits well for my customers who like to see enterprisey features without going RedHat or Oracle. You may not have had to deal with “enterprise grade” stuff which loosely translates to bloody expensive and often horrible.
I’m an Arch fan too - actually I’m a Linux fan. I used to do Gentoo (10+ years) but I got tired of my lap overheating. Before that Slackware, Mandrake (Mandriva), RH, Yggdrassil oh and a fair bit of SuSE, not to mention everything Novell did since NetWare 3.1. Whoops, sorry, mind wandering 8)
Wayland and Pipewire will probably do everything eventually but for now, you have functionality gaps. Pipewire is quite amazing and being developed at nearly indecent haste. It might be worth diving in to their community. At worst you will find a lot of like minded people to you.