I think the good idea is to add links to the package in the AUR when listing packages.

Additional context

When I install packages, when I do not yet know the exact name for the package, or when I want to observe what packages there are for my request, I run yay with the part of package name of interest, for example yay vivaldi.
Now the list of packages containg "vivaldi" is shown.
Now I see a package that I am possibly interested in or want to read comments. Let's say it is "vivaldi-autoinject-custom-js-ui".
Now I need to select the package name, copy it, go to web browser, go to aur.archlinnux.org, paste the copied name.
This is too much actions to do.

Describe the solution you'd like

I want to ctrl click the package name in Konsole, and it opens the aur page (in this case it will be here).

This can be done with OSC-8 standard.

Describe alternatives you've considered

Create a rule for Klipper, that pop-ups the menu to go to the URL when selection matches regexp for "aur/(.*)".