A friend of mine creates cute little drawn characters in a very particular style which is immediately identifiable as his. In China and Hong Kong someone sent him photos of a line of clothing that seems quite popular and is selling well - sporting his designs without permission.
The Chinese clothing company hijacked his designs, and is making good money off him. And he can't do a darn thing about it.
He sent a cease and desist letter, mails, etcetera, but they're just ghosting him. No response, and taking actual legal action is just about impossible unless you are, or have the backing of, a semi-large company, have access to a middle-man in location, and have access to well-endowed legal funds.
So he is powerless, and others are enriching themselves using his original work.