They’re Echeveria. Apps like PlantNet can take a photo and then give general ID through crowdsourced image matching. I’m no good with echi species, but these are certainly not Sempervivum as the below poster said.

Chicks and hens. They are very hardy and love water and rocks. They spread via runners, a lot like strawberries, with “chick” offshoots from the mother “hen.”

They are even nicer when flowering.