“CAPD” testing is completed by an audiologist who specializes in that area (the average audiologist is not completing this testing). I would honestly google “central auditory processing testing near me” and see if there is an audiologist with a private practice dedicated to this specialty. If not, you could contact your last audiologist and see if they have any good names to refer you to.

Otherwise, you could potentially cut to the chase and try a program for auditory processing training online. I know LACE is a popular program that is self-guided. It would be worth getting a proper diagnosis though if possible.

You may have a Central Auditory Processing Disorder—worth seeing if you can get referred for a CAPD specific test if your traditional audiogram keeps showing up as normal.