I have just installed cups 2.4.1_1 on my KLV-beta14 system, and I'm finding some interesting developments in the CUPS interface (or lack thereof). So I'll report them here and see if anyone has some insight.
The CUPS packages all installed correctly from a freshly updated Octo-XBPS manager. The first thing I tried was finding the cups pdf printer in a couple of applications (Geany, LibreWolf) and it wasn't there. So then I tried my bookmark in LibreWolf for http://localhost:631/printers/. And Libre couldn't access the address. So next I did a file search on the '/' directory for 'cups' and found all of the installed files present, including the help directory full of html files. I began reading them and discovered that the links in the help files are 'deprecated' and all of the link references to http://localhost:631 aren't valid anymore. So I searched for perhaps an alternate 'gui' html page. I finally opened index.html which contained some of the familiar links of the old localhost:631 printer management html page. But they too pointed to http://localhost:631 and again turned up empty.
I didn't see any cups entries in the KLV-menu, but then I noticed a 'manage printing' entry, and that too tried to open the non-existent http://localhost:631. So I'm left with nothing but command line at the moment, and that looks far too involved to spend time with when I'm sure there's a more user-friendly interface available.
I also installed hplip, the HP print drivers, and now I'm considering installing the hplip-gui in hopes that maybe it gives me access to 'add printer' in cups, but I'm doubtful. I will do some internet searches and see what I find, but I thought maybe the answer is easy and obvious to those who know the ins and outs of cups.
Am I missing the obvious location of the user-friendly CUPS manager?