I can't get it to work even on IPv4.
I'm on the last stable version.
In the headers I see QUIC but Chrome dev tools says I'm using HTTP 2:
alt-svc: h3=":443"; ma=2592000, h3-29=":443"; ma=2592000, h3-Q050=":443"; ma=2592000, h3-Q046=":443"; ma=2592000, h3-Q043=":443"; ma=2592000, quic=":443"...