Nas is right (however I am sure that my mind would also go to the weird rare malignancy rather than the common as muck benign finding)
Have you heard the saying "if you hear hoovebeats, first think horses, not zebras"?
I think it is reassuring that you have a long history of fibroids, which don't always disappear quickly, completely or at all after menopause, particularly if you take hormone therapy.
It is not "rare", simply that post-reproductive women's healthcare is very much neglected and the vast majority never have a pelvic scan unless they either pay for one or report symptoms.
It would be much more concerning if you had no fibroids before menopause but had developed these since.