The usual stuff? What stuff?
To me it looks like you are taking rounds with something downloaded from HP - and is usually a bad idea - as a lot of things can go wrong - e.g. overwriting system files with incompatible versions.
And the hp toolbox app requires python-pyqt5 to work - which may explain why you cannot get it working.
It also appears to be a genuine xyproblem where you have tried a lot of things which may have worsened the issue and thas making it very difficult to provide any meaningful response.
Sounds like a custom package to me
Manjaro repo has a meta package containing everyting you need to print - and likely something you don’t need - in any case
sudo pacman -Syu manjaro-printer
How is the printer connected and which model is it?
It can be anything from bad cable, no response to tcp/ip request - even the wrong driver can do that.