Gastrooesophageal reflux is super common from GLP drugs, they delay gastric emptying so the stomach acid sits there for longer and probably in larger volumes at a time, making it more likely to go back up the wrong way, and quite possibly it messes with the way the muscles and control of movement in the stomach works. It is probably better to treat it than leave it untreated if it is causing symptoms, as exposing the oesophagus to acid long term can damage it.
So if it is only a problem above a certain dose, you need to stay below that dose, if that is a practical solution , or treat the reflux with proton pump inhibitors like omeprazole. Not over filling the stomach can help, so not eating too much at once, not drinking fluids at the same time as eating and not eating or drinking much before bed can help, as it is usually worse lying down, or basically the same advice for reducing GI side effects from GLP's.