Ai recreations (which seems to be the topic) are not copyrighted by the original artists just because they sound similar. (See the many endless lawsuits when one artist sues another because they think someone stole part of their song).
Most of the classical moneygrab releases seem to be out-of-copyright works.
Anyway, these releases are there, so obviously they are making money off it.
There’s some info here, too, as already linked previously: