MTB derailleurs have a few links of wrap to spare so they can do their rated capacity on a full suspension bike.

The later 9 speed and 10 speed MTB derailleurs could do 40t in a 1x but the medium cage versions (like Zee) didn’t have the wrap for it except on a hard tail. The 1x11 derailleurs are rated for 46-47t but get pushed to 50t... and it’s a chain wrap problem again.