Reincarnated as a Girl (гет)

By all accounts, he should be dead. He knew he should be dead. Bruce’s hand was basically destroyed and his body was resistant to radiation. Hell, Thanos’ hand was also destroyed after he used the gauntlet, and he was an alien for Tesla’s sake! Tony was just a normal human, admittedly an incredibly intelligent genius of a human, but normal nonetheless. His body wasn’t made to withstand the raw power of one infinity stone, let alone six. So yeah, he should be absolutely dead. 100% gone. Sixty feet under as opposed to the usual six. And yet…
“Congratulations Ms. Stark, it’s a girl!”
Or:
In which I've been reading way too many reincarnation isekai manga and so Tony Stark is brought back to the moment of his birth after he snapped in Endgame, but this time as a girl!