EDIT:
Although my original answer applies to trying to use new versions before being announced, @KAD brings up an excellent point about a broader scope of the issue in a reply.
Original answer:
22.03.3 hasn't been announced. It isn't finished building.
It is a good idea not to try to use new versions until announced. There is a note about it on the release and security announcements section:
Also, there usually isn't any official links to the release notes until build is complete and images ready. The work-in-progress release note for the .3 release has a warning that it is not complete.
It can be very useful to read release notes to check for suitability for your use case before using.