I asked via  if other features may be added to Jakarta Persistence
3.1 (target would be the Jakarta EE 10/10.1 Platform). Response 
indicated that more features are expected (as we know many feature
requests remain to be sifted through).
If we feel strongly about any one feature being included, we should push
for it!  is the long standing open list of issues (many from the JPA
expert group issues that were migrated). I think that the timeline is
still being worked out but I think by early fall the list of features
will be locked down if not before then. Personally, I'd rather see the
features be locked down sooner rather than later.