Chess problem solving (i.e., compositions)

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It would be nice to have a dedicated 'puzzles' (e.g., organized under 'Custom Puzzles') with compositions spanning the categories of WFCC competitions (#2, #3, moremovers, studies, helpmates, selfmates). There are a few courses on chessable (e.g., Endgame Studies 101 by IM Kostya Kavutskiy and a couple of others by/based on Dvoretsky, or Self Mates: Unique Chess Studies by Maurizio Matteoli) but that's about it. Compositions (especially studies) do show up in 'puzzles' (quite common for the Sunday Daily Puzzle, kudos to the curators!), but I do long for the option to work on, say, #3 or studies when the mood strikes me, undistracted by more practical tactics.

Many thanks to the chess.com team for a great website with lots of playing/solving options and useful tools!