Yes, both are android forks.
I think the user requirements are distinct for daylight users and grapehene users.
Graphene security requirements, stipulate a secure element that daylight tablet does not have today.
DaylightOS is a fork if Android, no?
They could, with some work, rebase on top of nostr:npub1235tem4hfn34edqh8hxfja9amty73998f0eagnuu4zm423s9e8ksdg0ht5 to gain considerable privacy and security for their users.
Discussion
I would never use a mobile device or tablet that didnt live up to nostr:npub1235tem4hfn34edqh8hxfja9amty73998f0eagnuu4zm423s9e8ksdg0ht5's standards.