NoobUser I don’t know what is Mooltipass but for me I’m using a Nitrokey Storage on which I store a Keepass2 file (which can record any number of passwords).
At this moment I just store the file there (so, in a safe encrypted place, and with its own password in addition) but I know I also could add OTP to the Keepass file.
For what concerns cloning the key for backup purposes it’s a concern I definitely share with you, and I initiated a thread on this here, you can have a check!
Hervé