Would Viveve or ThermiVa be better for bladder prolapse and general looseness/air bubbles?

Neither viveve nor thermiva will correct bladder prolapse. This is because they are both temporary skin treatments and bladder prolapse is not a temporary skin problem. The same is true for general looseness aka laxity. The problems that you have are the result of damage to pelvic floor supports and muscles beneath the skin. What you need is a clinical examination by an expert in pelvic floor issues. These experts are gynecologists, urogynecologists, or urologists. The solutions to your problems are directed at the muscles and pelvic floor supports and not the skin.

Dear concerned patient.
The answer to your question, is depending on what your pelvic finding is.
If you have only first-degree cystocele and uterine prolapse, you will benefit from Morpheous8 V, which is a radiofrequency micro needling. but if it is more than first degree you still will benefit for it, but surgery might be a better option.
some other information's are missing, which are 1) how many vaginal deliveries you had, 2) what is your age and menstrual cycle status, 3) are you planning to have more children.
the answer to the above questions also will guide your doctor to consult you properly.
Good luck and best of health.

I prefer the Viveve as it is a one time treatment. I always treat in the upper vagina and often will do double treatment on the same day and treat externally. I hope this helps you.