Most likely it is a lack of Apple Silicon compatibility. Prologue, Mystic and Spector were produced for Steinberg by a third-party developer; I’m not sure what the situation is for Loopmash.
A secondary issue is likely that the licensing has not been updated to Steinberg Licensing. I presume that those copying the files over from Cubase 11 are relying on a Cubase 11 licence being present on their eLicenser.