That's exactly why we need a clear definition of 'trans+', who it includes, who it excludes.
Given that it seems to be the new new thing, it's important for groups who use it to define it - 'LGBTQ+' was at least specific about what groups were included even if
[a] it wasn't really about the first three letters at all and
[b] the make-up of the other letters was unclear.
'Trans+' could mean anything. You refer to 'online' but what online source are you referring to - a quick search shows one source as saying that the trans umbrella includes
'non-binary, genderqueer, genderfluid, agender, and others'
'and others' isn't very helpful, is it?
while a second adds:
Bigender, Demiboy/demigirl, Pangender, Androgynous.
And it defines Androgynous as : A person whose gender presentation is a blend of both masculine and feminine characteristics, though their gender identity may not necessarily be non-binary.
Woo-hoo! that's me! Hey Ma, I'm trans+!😁
Just as a whole array of laws and regulations and workplace practices were set up around 'gender', without there ever having been an agreed definition of what it was, we now have this new term 'trans+', which could mean anything, and which needs to be clearly defined.
That's all I'm asking for at this stage: clarity.