The most important PQ crypto for TLS is key exchange, i.e. a replacement for ECDHE -- *not* signatures (i.e. a replacement for ECDSA). PQ key exchange doesn't need anything to be changed in the certificate, so you can create a standard Namecoin TLS certificate today with the default settings, and it will work with whatever PQ key exchange the TLS client/server support. PQ signatures are going to be trickier, because while you could in principle create Namecoin records that support them, most PQ signature schemes involve public keys that are quite large, and Namecoin does not support hashing the public keys (because doing this would break a lot of TLS software). Also there's not much point to doing PQ TLS signatures with Namecoin since they're authenticated with a non-PQ blockchain signature.
Speaking of signatures in TLS, p11mod now supports signatures. https://www.namecoin.org/2022/01/27/p11mod-signatures.html
Biolizard will have to break this one down barney style for 99% of the readers who only want to know "wen moon?"