AES isn't really threatened by quantum computing AFIK

And most encryption is to use "something" to get an AES key and then us that to decrypt data.

And that "something" (e.g. RSA/ECC based approaches) is what is threatened by quantum computing. But it's also not overly problematic if that "something" becomes slower to compute as it's done "only" once per-"a bunch of data".

AFIK the situation is similar for signing, as you don't sign the data itself normally but instead sign a hash of it and I think the hashing algorithms mostly used are not threatened by quantum computing either.