The past few times I’ve run yay I’ve got these warnings about packages that are orphaned/not in the AUR. Based on the names I’m assuming these are leftover from the upgrade from kde plasma 5 to 6, are these safe to remove now? And secondly how would I find orphaned packages like that if I wasn’t using yay since I never installed these from the AUR?
Yes those are leftovers. Khotkeys got replaced with kglobalaccel - safe to remove but install kglobalaccel. Krunner5 is replaced by krunner, kquickcharts5 by kquickcharts. For kpeoplevcard i don't know