Windows 11 Pro 22H2 (domain) not updating to 23H2/24H2

We have a decently large domain.  For whatever reason, we have a large amount of computers on the domain that have not gotten any feature updates past 22H2.  Running Windows Update on these computers manually gets the result "You're up to date."  I've set a Group Policy to target Windows 11 version to 24H2, but nothing has occurred or updated for a week since.  Running a manual update via mounted ISO (timed) took 3 hours, which is not feasible to do one-by-one.

What are my options?