What do you think about https://datatracker.ietf.org/doc/rfc9250/ support ?

QUIC features that are very useful for reducing latency at connection establishment, such as 0-RTT, have privacy implications by allowing the same user (or more precisely, the same machine) to be tracked. And this works even if the machine has changed its IP address in the meantime.