Yes it's your call. It was for me, it gave me peace about being labelled as thick as a kid and it helps me in day to day life.

I have multi-sensory aphantasia. No pictures/sounds/tastes/touch/smell. My inner voice is soundless but constant.

I discovered aphantasia at 40; it is not a lack or detriment merely a difference. I talked with my Mum about it, she is has aphantasia and didn't realise and she is 66.

Aphantasia doesn't hold you back or make life harder; especially since you can go decades without realising that you have it.

You may have other stuff, ASD or ADHD etc....but aphantaisa isn't in the same realm.

You don't need a diagnosis to know you're built different, you just need it if you want to get medical care or assistance for it.

If your experience lines up with others, and you identify with their struggles and interests when other people do not, then to me that's enough.