If your trans activism stops at binary trans people, you're not a trans ally.
If your trans activism stops at trans women, you're not a trans ally.
If your trans activism stops at trans men, you're not a trans ally.
If your trans activism stops at gender conforming people, you're not a trans ally.
If your trans activism stops at perisex people, you're not a trans ally.
If your trans activism stops at monogender people, you're not a trans ally.
If your trans activism stops at people who label themselves at all, or at people who label themselves in the way that makes sense, and is not "contradictory", to you, you're not a trans ally.
If your trans activism stops at white people, you're not a trans ally.
If your trans activism stops at abled and neurotypical people, you're not a trans ally.
If your trans activism stops at thin people, you're not a trans ally.
If your trans activism stops at singlets, you're not a trans ally.
If your trans activism stops at people you find sexually attractive/are available to you, you're not a trans ally.
If your trans activism stops at people who express their gender based on your expectations/norms, who behave, present, talk or act the way you expect them to based on their gender, you're not a trans ally.
And gentle reminder that you need to put in active effort to be a trans ally even if you are trans yourself. There are a lot of people, similar and different to you, going through different and similar things, and you need to act as an ally to anyone that is not you.
Edited to add the last couple points!
Adding a disclaimer since this post isnt worded in the clearest way. The way it's meant to be interpreted is: "If your trans activism stops at x, you're not a trans ally." Meaning that if your trans activism only goes as far as a certain identity (perisex, binary, white) and doesn't include identities outside of it (intersex, non binary, poc) then you cant consider yourself a trans ally because your allyship comes with the requirement of others being a certain identity and thus excludes part of the community.
And yes. Your trans activism shouldnt stop, period. However everyone disagrees on which identities are covered in that, that's why I made this post pointing out different identities perceived as "normal" vs the ones beyond them, which end up excluded or not considered, like the perspective of multigender people or plural people and systems.