I don’t know if raw package counts is the best comparison. Unlike say Fedora, Arch bundles everything related to a project in the same file. If you want Qt6-base on Arch, that is one package. If you want it on Fedora, it is going to have a lib, header, docs, and maybe a few other packages.
Just from personal experience, I do not have issues with finding packages in the main repos, with only a handful of my packages coming from the AUR. This is not the case with others, like Fedora where extra repos need to be added, like EPEL and RPM Fusion.
If you use
-Qeq
, you should be able to skip the awk part of the command.