r/UsagiYojimboDojoSub

Usagi Yojimbo is one of my favourite comics but for some reason a proper animated series has never been made. And before anyone says anything ,yes ,I am aware of the Rabbit chronicles but that doesn't feature Usagi (outside of a cameo). It focuses on his stupid great grandson or whatever. Was the decision to make a cartoon not focused on Miyamoto Usagi a Netflix decision or a decision made by Stan Sakai? I know he is very protective of his creation.

Usagi has only appeared in animation as a guest character in TMNT cartoons but never gotten a cartoon series of his own. Why is that? What possible reason could there be for not giving one of the greatest comic book characters of all time an actual animated adaptation?