When you add a new printer (eg. ipp://192.168.1.100 ) and click on Next you get to the "Choose driver" dialog. Here it is separated to the Vendor list on the left and printer list on the right. Some venodors have only few printers (e.g., Fujitsu), but e.g. HP has a looooong list and it is hard to find the printer (try to find LaserJet Pro M252dw). It would be nice if there can be a search box so I can filter using a string (e.g. M252).
It should be fixed in Plasma 6, thanks to https://invent.kde.org/plasma/print-manager/-/merge_requests/63 See also https://invent.kde.org/plasma/print-manager/-/issues/2/