The Shogun in One Piece is treated more like a king than an actual general. No one is going to go to the 8 year old Momo and ask for military commands.
If all the kings in the WG could leave their countries for weeks on end to attend the Reverie. Momo can leave Wano in order to do something of even greater importance.
If all the kings in the WG could leave their countries for weeks on end to attend the Reverie. Momo can leave Wano in order to do something of even greater importance.