More on the treatment here https://www.endogenex.com/recet/

Sounds like they put a tube down your throat all the way to the small intestine and then zap it with electricity which somehow helps.

Dr Celine Busch, lead author of the study, commented, “These findings are very encouraging, suggesting that ReCET is a safe and feasible procedure that, when combined with semaglutide, can effectively eliminate the need for insulin therapy.”