Can you lose 80+ pounds on GLP1 medications?

I had a doctor consultation today with the idea of me wanting to start taking a GLP1 medication. He told me that these medicines are only capable of making people lose 20% of their body weight. Considering I’m aiming towards losing at least 80 pounds that made me feel a bit apprehensive. He suggested that I start with the allurion balloon first then progress to GLP1 medications to insure I can lose all the weight.

My question is has any of you had success with losing that significant amount of weight? Because if there are a lot of GENUINE success stories then I can go back and insist on starting the GLP1 medication. My doctor claims that the stories online are not real so I don’t know what to believe.