You can run DoT on 443 as well.
Providers that want to block DoH or DoT are going to block providers based on destination IP or certificate fingerprints, not port numbers.
Providers that want to block DoH or DoT are going to block providers based on destination IP or certificate fingerprints, not port numbers.
And running DoT on a non-standard port breaks all sorts of things because it will be ... non-standard.