Does GLP-1 medication mess with sleep at all, or is that not really a reported effect?

It's not among the most commonly reported effects, but some people do mention sleep changes, sometimes related to nighttime nausea or digestive discomfort rather than a direct effect on sleep architecture itself. For others, sleep can actually improve somewhat as weight loss progresses, particularly if sleep apnea symptoms were a factor beforehand. It's not a dominant or universal side effect either way. References: https://obesitycanada.ca/healthcare-professionals/adult-clinical-practice-guideline/