Serum PTH has also been known to play an important role in the accumulation of fat through several mechanisms such as https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5729672/
Patient complaints about abdominal fat accumulation are widespread. It wasn't signaled in the clinical trials, so the medical literature will tell you that you are unlikely to experience this adverse effect. Most patients report that their physicians suggest that they are simply eating more or not exercising enough. Cheers to you internest for suggesting imaging. Ask this clever person if an abdominal ultrasound would advantage you.
The link is a bit of a slog, but essentially PTH interferes with the normal death of fat cells and since our bodies keep replacing them anyway we end up with a big belly.
Janflute, is your doctor using bone markers to determine a third year, or is this common practice.