"Procedures" to them includes literally all gender affirming care. Therapy? Procedure. Puberty Blockers? Procedure. HRT? Procedure. Social Transition? Procedure. This will only ban federal support but won't actually ban gender affirming care entirely, mainly because that would take an act of congress. This is still bad and hurts all gender specialist doctors that get federal grants, which I have no idea how many of them there are.
The next step is congress banning it for everyone. They did 19 because that's them saying that even when you are old enough to vote and join the military you can't make a decision about your own body. Just a matter of time.
I definitely agree they should be consistent, in other countries the drinking age is 18 like voting. Of course I think banning this shit is BS still though.