I don't think reviewer bandwidth is the main issue for this patch. It's a 200-line change (considering C code, there's more in docs/tests), and the code is not overly complicated / sensitive (in the sense that it's very isolated and unlikely to break random stuff).
For me the main challenge was that it's still considered a draft (AFAIK). It may be unlikely to change, but if it does I'd rather not have to deal with persistent UUIDv7 data generated per some previous spec.
Also, if I really want/need UUIDv7, it's not that hard to create an extension that generates UUID in arbitrary ways, including the proposed v7.
For me the main challenge was that it's still considered a draft (AFAIK). It may be unlikely to change, but if it does I'd rather not have to deal with persistent UUIDv7 data generated per some previous spec.
Also, if I really want/need UUIDv7, it's not that hard to create an extension that generates UUID in arbitrary ways, including the proposed v7.