it would be appropriate to re-iterate that the ward is is indeed female and that there are no men present
It's brainwashing. I know 1984 gets mentioned a lot (with good reason) but this is clearly straight out the book.
Do not believe your own eyes and what you know to be true. Winston had wrote in his diary that freedom was been able to say the truth 2+2 = 4, so he is asked how many fingers his torturer is holding up, Winston see 4 fingers and says 4. That is wrong it is 5 because the party says so. Winston is tortured until he says 5, but that is not good enough, because Winston needs to believe it is 5 and not the 4 that he sees.
Her duty of care extends to protect people from harrassment and should the woman continue to make demands about the removal of the transgender patient and be vocal in the ward about it would be appropriate to remind her of this
Ultimately it may be the complainant who is required to be removed
The patient may not be in a torture chamber, but her punishment and or pat on the back, comes down to, believe what you are told not what you know, or told off and belittled and possibly refused treatment, if you don't agree with the party line.