Can XMPP MIXes be end-to-end encrypted?

Question

Alternatively phrased, is XEP-0369 (Mediated Information eXchange) compatible with OMEMO in XMPP? If yes, are there any existing implementations?

Answer 1

Alternatively phrased, is XEP-0369 (Mediated Information eXchange) compatible with OMEMO in XMPP?

Yes, but I am not aware of any implementations.