How often vaginal atrophy shows up
The patient pages linked below are the place to check a current figure. Whatever the figure, your own symptoms decide whether to raise it at your next visit.
Why a number matters less than it seems
A prevalence figure describes a group. It cannot tell you whether your symptoms are GSM or something else, and it should not decide whether you bring them up. If dryness, discomfort or urinary changes are affecting your week, that is reason enough to raise it. The Menopause Society's sexual health pages explain the topic for patients, and the Office on Women's Health treatment page shows where it fits among other menopause concerns.
Getting symptoms onto your appointment list
Busy stretches are when symptoms get put off. Pick one appointment you already have, or book one, and put this on the list. Bring a short note on what you notice, when it is worse, and what you have already tried. If you are on a hormone or other therapy plan, include any missed doses or changes in routine.
Who can say whether it is GSM
Raising vaginal atrophy symptoms during a busy stretch is the practical step, and whether they fit GSM is for a licensed clinician who can examine you.