Transmasc and transfem are not the only two trans identities that exist.
If you want to be a trans ally, you need to include transandrogynous, transneutral, transnull, transgenderless, transsexless, transxenine, transoutherine, transaporine, multitransitional, multigender, and unlabeled trans people.
Additionally, you need to:
-Acknowledge that cistrans/transcis (cisgender transsex, cis & trans due to being multigender, cis & trans due to being intersex, cis & trans due to being plural, etc) people exist.
-Understand that trans =/= perisex, and that intersex people can be trans.
-Understand that transfem =/= AMAB, transmasc =/= AFAB, and include assignment variant trans people in your support.
-Support people who are gender non-conforming and/or pronoun non-conforming.
-Support people who use neopronouns.
-Stop depersonalizing non-binary people by calling them "they/thems" (not all enben use they/them anyways), and integrate enben/enbies and enban/enby into your vocabulary.