This study will test if non-ablative monopolar radiofrequency can help improve vaginal tissue and reduce symptoms of Genitourinary Syndrome of Menopause (GSM) in postmenopausal women. The study is a double-blind, randomized clinical trial. The study will examine the impact of the treatment on sexual function, vaginal health, and quality of life over an extended period. There will be two groups in the study: one will receive the non-ablative monopolar radiofrequency treatment, and the other will receive the placebo treatment. Participants will have six treatment sessions and will be checked at the start, end, and three months post-treatment.