The current consensus amongst medical professionals is that gender dysphoria is not requisite for being trans. This was not the case in the fairly recent past.

There is also "gender euphoria" which may be experienced by people who do not/did not experience dysphoria.

I'm not sure whether from a clinical standpoint distress about incongruance is the same as dysphoria.

There are a lot of people who would have failed to meet previous diagnostic criteria but nonetheless are happy to have received gender affirming medical care. I think the best we can do is provide people with bodily autonomy on an informed consent basis.