If the drives are recognised there might be a way to force import. Probably no need to reisntall. (And it is a a “password”, right? Not a keyfile stored on the present boot pool. You have backups of THAT secret.)
But set this M.2 adapter away. Use another computer and plug the drives directly to motherboard ports.
Since you have a Windows, PC, as a last resort you could attach the drives to this and use Klennet ZFS Recovery to scan. (Not sure how it deals with encrypted data though.) The bad news is that IF Klennet were able to recover data, this would cost you the price of a license…
So keep calm, make no hasted move, and let’s try to solve it “the ZFS way”.