The patch is adding functions for generating UUIDv7 in the database. Which you can already do, for example with the PL/pgSQL function from [1]. Or you can just generate them in your application code. As you mentioned everything else about UUIDv7 already works and didn't require any changes.

It's really more about convenience, and maybe a bit of speed.

1: https://gist.github.com/fabiolimace/515a0440e3e40efeb234e126...