Though it has been discussed that future versions of QUIC might allow other authentication/encryption protocols. Noise would be an interesting candidate.
Sure, but, it's important to caveat that QUIC requires specifically TLS 1.3 (or potentially subsequent versions in the future) and so features which require older TLS versions aren't useful.
Pre-shared keys are a thing in TLS 1.3 though there are subtle differences you ought to be aware of before implementing, but as I understand it SRP is not (at time of writing) and neither is anonymity.
It isn't possible to "just" take an extension to TLS 1.2 that altered the handshake mechanism and have it work in TLS 1.3 because the handshake is very different even though it was camouflaged so that rusted-in-place TLS 1.2 middleboxes think it's just TLS 1.2 and don't freak out.
