The issue has been resolved. Thank you.

Family Controls distribution capability for App extensions (7P8645AYBX, 3JW6U957WD, 8B2943ZAUY) submitted on 13 March. Stuck in "Submitted" status for 11 days now. Filed code-level support on 19 March (Case-ID: 19008658). 5 days ago. Got an email from a Apple DTS Engineer but no progress yet. Looking forward to seeing progress soon. Thank you.