The dor tahapuchos paskens that for pikuach nefesh it’s allowed to “transition,” but only if there’s a serious concern of suicide. That’s because the laavin being violated by the operation (seris, lo yilbash, etc..) are not yehereg velo yaavor.
Homosexual relations, however, are yehereg velo yaavor, and cannot be violated even if a person is suicidal. Hence, the marriage is assur, according to the p’sak of pretty much the only posek who has discussed the issue at hand.
The TE does NOT say that such a person can marry a man. There’s no way he or any other person with a mo’ach bekadkado would think of allowing such a public chilul Hashem and sin to happen.
Ask rabbi bender; there’s absolutely no heter for this.