Transmeds who claim to support non-binary people are usually very conditional about it. They effectively just turn the gender binary into a gender trinary. They would only validate enbies who fit into a very rigid "neutrois, entirely in-between, and androgynous" third category of gender.

If you're androgynous or desire a gender-neutral presentation, experience gender dysphoria and undergo transition to achieve said gender-neutral appearance, go strictly by they/them pronouns (they really hate mixed sets like she/they and he/they especially, from what I've noticed), and refuse to embrace any traits that give off the impression of you being male or female, then they might deem you valid, but ultimately, transmeds are divided on enbies in the same manner right-libertarians seem to be divided on things like abortion oddly enough.

Also, for some reason, you get points off if you're AFAB.