Gender is a very personal thing. You don't get to tell someone they're trans - some nonbinary folks do not consider their identity to be a transgender identity and that's entirely valid. You can dive as deep as you want into the technicalities of the transgender umbrella, but at the end of the day these are words we are using to describe ourselves and if "myself" does not align with "transgender" then anyone insisting that it does align is misguided at best.

Aaaaaaalllssso you can fuck around with gender within your AGAB and not consider yourself non binary. Femboys are valid and many are cis. There's probably some transmasculine femboys out there!