Yes, trans-inclusive communities should have fluid boundaries, because some people are starting hormones while others are stopping them, or alternately increasing or decreasing their dosages, or always deciding what kind of trans they are, or maybe they decide they’re not any kind of trans at all but that doesn’t mean they want to defriend the trans friends they made along the way, and likewise the trans people in those circles should be able to stay friends with someone who changed their pronouns and then changed them back. It is all fine. What’s not fine is making rules about who isn’t real and how they shouldn’t be allowed to live their gender.