Not an apex domain
The domain 3A5682463336010EF874561D4B3210E5.A3F1ACE4B8CE68E06D439DAADF7F6CF6.55G552Y5K55bpvAY5Zcf.sectigo.com is not the root of its zone.
Instead, try zone transfer on sectigo.com .
Instead, try zone transfer on sectigo.com .