Support for 1U size format is on the list, this will come.
-- modulargrid
Be sure to have something like a "universal" or "hybrid" choice in the list then, and not only IJ/PL!
It would also be nice if there was a way to superimpose 1U (IJ) modules over this series of adapters :
https://www.modulargrid.net/e/xodes-fc313-24hp
There may of course be other adapters that could use this kind of feature, as long as there's also a "rotate module" option! :)