"Requires support" does not mean you are completely incapacitated without that support, nor does it mean you will always require the same support. If your life shifted from surviving ok-ish to thriving and improving when you found tools to help yourself, to me that sounds like you were meaningfully incapacitated before.

There are many conditions that a key point of diagnosis is impact to your life, and that's a conversation to have with the practitioner doing the diagnosis. It's a starting point not a bar, unfortunately nuance gets lost a lot once it's talked about in the social sphere/used as common parlance.