Those who can't pronounce correctly are all caused by the wrong pronunciation method. Most of them are not about vocal organs. If the frenum is too short and affects the normal movement of the tongue, minimal surgery can be done. But don't go to the swindler who cut the tongue band to treat Lickitung, which will cost you an expensive operation. Just go to a regular hospital.
If you don't know if your tongue strap is too short. Send a picture below and compare it yourself.