Woah. Read that carefully (my bolding):
c. Military service by Service members and applicants for military service who have a current diagnosis or history of, or exhibit symptoms consistent with, gender dysphoria is incompatible with military service. Service by these individuals is not in the best interests of the Military Services and is not clearly consistent with the interests of national security.
So, if you've ever been an inadequately manly man or womanly woman (and we'll decide what that is), you can't be part of the armed forces of the USA – even in a non-combat role.
This isn't "if you're on long-term medication which might not be available in the field, then you cannot have a role which involves battlefield deployment". It's something else entirely.
It might accidently be badly written – which does happen – but that doesn't make it the less dangerous because others can still take such a regulation and run with it.
Or the wording might be deliberate.
Either way, it opens the door to purging the armed forces of The Wrong Sort of People.