If you are new to both subjects, menopause and the pelvic floor can seem unrelated. Here is the link one research article draws.
What the research says about the link
The article at pmc.ncbi.nlm.nih.gov states: Furthermore, it is a fact that estrogen deficiency after menopause may cause atrophic changes of the urogenital tract as well as various urinary symptoms. In plain words, lower estrogen after menopause may change the tissue of the urinary and genital tract and bring urinary symptoms.
Reading up on pelvic floor problems
Cleveland Clinic's page on pelvic floor dysfunction, its symptoms and treatment is a sensible first read. The pelvic support problems page at MedlinePlus and the NICHD overview of pelvic floor disorders cover the same subject from public health sources.
The cheap step and the step that needs a clinician
Among the treatments MedlinePlus lists for pelvic floor problems are Kegel exercises, special pelvic muscle exercises. That makes them a low-cost thing to ask about first. Be skeptical of anyone who skips the asking and sells a package before a clinician has examined you.
Ask before you guess
Urinary symptoms after menopause are a reason to talk to a licensed clinician, not to troubleshoot alone. Bring your questions. Plain ones are the best ones.