Does anyone have successfully tested PQC within OpenZFS?
https://www.youtube.com/watch?v=frnLiXclAMo lists the OpenZFS encryption algorithms as AES-CCM and AES-GCM. AES is generally not weak to quantum attacks, but I cannot speak specifically to the AES-CCM and AES-GCM modes.
Quantum attacks are generally a problem for public-key cryptography and key exchange (i.e. diffe-hellman). I wouldn’t worry about it in situations where the same key is used to encrypt and decrypt, I would only worry for situations where one key is used to encrypt and another key is used to decrypt.