There’s definitely a few
Back to the question
For the moment, while it might not be ideal, I can suggest a couple of workarounds while we wait for some development on the Puzzles section 
- You can bookmark the individual puzzles, in the same way you can link to them. So make a browser bookmark (even bookmark folder) for the ones you like, eg maybe
Play Go at online-go.com! | OGShttps://online-go.com/puzzle/22118 The search on the puzzle page actually allows you to search users not just the names of puzzle collections. So if I want to find the Maeda Nobuaki puzzles by @atorrante I could searchOk this one was just because Atorrante happened to add their name into the puzzle titles OGS Puzzles: Workshop & Laboratory - #7 by AtorranteMaedaorNobuakioratorrante(and see 6! pages of puzzles contributed by @Atorrante 10 per page ~60 collections!). I’ll admit being able to search users on the puzzles page isn’t intuitive, I just tried it and it worked 
The statistics and things would be nice, and I don’t have a good workaround for that one