OpenSSH allows to use hybrid mode with many private keys of different type and even stored on different hardware like Nitrokey, Rutoken, etc. at the same time for a single session.
E.g. 4 different private keys are required (say Nitrokey, Rutoken ECP2, Curve25519 and Postquantum one): AuthenicationMethods=publickey,publickey,publickey,publickey Will it prevent session analysis if only some part of keys (not all) were leaked or guessed by quantum provided session symmetric cipher is strong enough?
