Same here with my MacBook Air 15'' (M2).
I was running 15.0 Public Beta and wanted to upgrade to 15.1 but my installation failed. I have tried everything including Terminal commands to delete the stuck 15.1 files but nothing works.
I cannot even reinstall MacOS from Recovery Mode and deleting 15.1 files through Terminal does not work either. I am looking at a dress install or rolling back to July 18 with my Time Machine load. No beuno.