The modrinth project need to update.

The CurseMaven only holding id on files instead of version number that isn't readable.

The uptake of Lootr on Modrinth is extremely minimal compared with CurseForge and, until I get uploads working alongside CurseForge, manual updates will take a while.

That said, you can simply view the available files on CurseForge, select the one you want and then copy the file ID from that page for CurseMaven.

There are 388K on Modrinth. Hmm

and, until I get uploads working alongside CurseForge, manual updates will take a while.

Make sense

There are 388K on Modrinth. Hmm

For comparison, the previous single version for Fabric for 1.20 available on CurseForge had almost 300k downloads from mid-February until now, versus 388k total on Modrinth for all versions.

As of 1.21's Architectury-based multiproject, builds are now being published on both CurseForge and Modrinth.