As the author of a popular ULID implementation in python[1], the spec has no stewardship anymore. The specification repo[2] has plenty of open issues and no real guidance or communication beyond language implementation authors discussing corner cases and the gaps in the spec. The monotonic functionality is ambiguous (at best), doesn't consider distributed id generation, and is implemented differently per-language [3].
Functionally, UUIDv7 might be the _same_ but the hope would be for a more rigid specification for interoperability.
[1]: https://github.com/ahawker/ulid