You know how it works. Only Development makes promises about future development, and Support reports the supported environments. Even if I knew the plan (and I don't), it's not my place to say more than, "It ain't there yet."
My problem was with a PG 11.8 to PG 11.9 transfer, where a geodatabase upgrade wasn't available, but the OID support was corrupted by the export -- pg_dump actually corrupted the geodatabase before the PG 12 support geodatabase changes could engage.
- V