Apnea is extremely common among weightlifters. Even a slight increase in the volume of muscle in the neck can trigger major changes in breathing.

Looking on scholar, this Meta-Analysis of RCTs suggests no difference in sleep apnea between the treatment and control groups and I'll take that over mayoclinic.

[0] https://academic.oup.com/biomedgerontology/article/60/11/145...

Well is the TRT causing the sleep apnea or are people with low T getting sleep apnea and then getting replacement therapy? Or could it be associated with being larger (i.e more muscle - more T, or fat - low T, can obstruct breathing).