Here is mine for EndeavourOS (based on Arch, BTW):
alias update='eos-update --yay'
alias updates='eos-update --yay ;
flatpak update ;
flatpak uninstall --unused ;
rustup self update ;
rustup update'
And related for uninstalling something:
alias uninstall='yay -Rs'
There is one in the works right now: https://www.nexusmods.com/app
The only problem is, there are just 2 games supported at the moment; Stardew Valley and Cyberpunk 2077. Many more will follow, but it takes time. And updates can break your current setup, because its heavy on working and changes. So this is more of a future thing. I myself wait for this right now.