Nope, you read that correctly. There is no current proven nonsurgical method for people to lose and keep off significant weight long term. The meta study I linked had to minimize the amount lost and the timespan to get positive results. Citations to the contrary are welcome. Anything aside from citations is not.

Bonus article: https://pmc.ncbi.nlm.nih.gov/articles/PMC10541056/

From the abstract:

Over the past three decades, researchers have found that biopsychosocial factors determine weight gain much more than personal choices and responsibility.