The last good looking sets for Monks were in Legion, which is ironic because Legion is the expansion that destroyed Monk class design the most.
Every BFA set sucks. Every Shadowlands set sucks.
And now with Dragonflight, other classes like Priest are getting awesome sets but Monks are still given garbage.
Because monk is one of the least played classes in the game so it doesnt have to look good or maybe because its mostly Asian monk based and if its to Japanese the Chinese don’t want it and vice versa.