There is a certification they get from a particular class. I've forgotten what the name and location of it is but if you Google "pelvic floor physical therapist" in your area then you can see the credentials those providers have. It should be obvious.

My urologist recommended the book "Life After Prostatectomy and other urologic Surgeries; 30 days from incontinence to continence" by Gaglani.

Highly recommended. Available on Amazon. She is an experienced pelvic floor PT. She goes into great detail what to do everyday and how to progress. Achieving continence is a multifold process: 1) strengthening pelvic floor and core muscles 2) weaning off pads 3) taking in enough water/fluids-limiting fluid intake actually increases leakage because of concentrated urine in the bladder irritating the bladder; increasing bladder volume/capacity 4) eliminating the foods liquids in your diet that cause bladder irritation and promote incontinence.