How is supabase a firebase clone? Branding and name aside its just a wrapper on a bunch of open source postgres stuff architected in a way that theoretically ha

How is supabase a firebase clone? Branding and name aside its just a wrapper on a bunch of open source postgres stuff architected in a way that theoretically has less vendor lock in (but is a huge pain to self host, but is at least self hostable in theory which postgres isnt)