Yes, it's already released and available here (just re-checked), PVE 7.x is the stable release after all..
Bash:pveam available --section system | grep ubuntu system ubuntu-18.04-standard_18.04.1-1_amd64.tar.gz system ubuntu-20.04-standard_20.04-1_amd64.tar.gz system ubuntu-21.10-standard_21.10-1_amd64.tar.zst system ubuntu-22.04-standard_22.04-1_amd64.tar.zst
I don't know what I am doing wrong:
pveam update
update successful
pveam available --section system | grep ubuntu
system ubuntu-16.04-standard_16.04.5-1_amd64.tar.gz
system ubuntu-18.04-standard_18.04.1-1_amd64.tar.gz
system ubuntu-20.04-standard_20.04-1_amd64.tar.gz