Do clinics specializing in gynecomastia treat the condition differently starting from the examination?

I'm looking for a good clinic for gynecomastia, and I've heard that I need to determine first whether it's just fat or a mammary gland issue.

It's confusing knowing that even though they look similar on the outside, the surgical approach can differ depending on the cause.

Would it be best to find a clinic that performs detailed checks, such as ultrasound examinations or mammary gland verification, to be good at gynecomastia?

I'm also worried that my chest might sink or become bumpy after the surgery. ㅠㅠ

For those of you who have found a good clinic for gynecomastia, what did you ask during your consultation?