How large in diameter are the rosettes?
If the largest rosettes are ~0.5 to ~1 inch in diameter or more, it is some variety of Petrosedum rupestre (or relative Petrosedum),
https://garden.org/plants/sear...
If the rosettes are very small, less than or around ~0.2 to ~0.3 inches, it might be Sedum japonicum 'Tokyo Sun' or Sedum hispanicum 'Aureum'
