Now that Qt 6.6 has been released , Qt 6.5 LTS is going commercial-only and the existing publicly available Qt 6.5 Git branches will be closed for new commits.
Release manager Tarja Sundqvist at The Qt Company wrote in this morning's announcement:
"With Qt 6.6.0 released and the first patch release (Qt 6.6.1) coming at November, it is time to enter the commercial-only LTS phase for Qt 6.5 LTS. All existing 6.5 branches remain publicly visible, but they are closed for new commits and cherry-picks. The exception is the Qt WebEngine, which has a 3rd party LGPL dependency.
Closing happens today, 18th of October 2023. After this, the cherry-picks go to another repository that will be available only for the commercial license holders.
The first commercial-only Qt 6.5.4 LTS patch release is planned to be released at the end of November.
The external module maintainers will have access to the Qt 6.5 commercial-only repositories."
If they hold their tradition like with the Qt 5.15 LTS series, they will make public new point releases as open-source a year later after each point release has first been pushed to their paying customers for that period.