The only question I've found right now related to post quantum crypto (PQC) is this one: Is it possible for an encryption method to exist which is impossible to crack, even using quantum computers?
However, this one gets a pass in my opinion, as it seems the question asker is unaware of the fact that PQC is a modestly sized research field nowadays.
I think that questions about PQC that clearly do not crucially require knowledge of quantum computation should be off-topic. This is primarily because specific PQC algorithms are classical algorithms and hence not quantum computing. I suppose the argument for 'quantum resistance' is a question about quantum computation, but I think this wouldn't be an essential component of most PQC questions.
More importantly, I think Cryptography is much better equipped to answer such questions, as PQC as mostly a field by Crypto people than Quantum Computing people.
So, to be short: I think questions about PQC that aren't quantum should be off-topic.
What should this site's policy be on such questions?
Not to be confused with meta question, this question is about questions that relate to 'computing', but not 'quantum'.