The satiation effect that GLP-1s cause also affects motivational drive. I've noticed my ability to get work done is hampered when I am at higher doses of my ozempic.
Please, no. GLP1s leave you worse off than when you started if you stop taking them. Weight is also not necessarily the factor that leads to sleep apnea; I got diagnosed while having a healthy weight in my 30s.
Something I'd picked up somewhere a decade or two ago was losing weight too fast can cause problems with bone and muscle density. So it could be related but not a direct effect.
I think they were referring to rebound weight though, something else I'd heard about these drugs that also doesn't affect everyone. A scarier one was one person whose weight got too low so they stopped taking it, but for some reason had a lot of trouble gaining any weight and getting up to a healthy level.