Sasha Banks is the first person born in the 1990s to main event WrestleMania.
Sasha Banks vs Bianca Belair is first WrestleMania main event between two African-American performers of either gender.
Sasha Banks vs Bianca Belair is first women's single's match to main event a WrestleMania.
"The Fiend" Bray Wyatt was originally slated to win his match against Randy Orton, but it was changed the day of the show. As it turned out Wyatt was in no mental shape to be performing as he was still dealing with the unexpected death of Jon Huber (aka Luke Harper {WWE} and Brodie Lee {AEW and other promotions}) in December 2020. He was written off TV after TLC 2020 when he was "burned" by Randy Orton for other reasons, but had agreed to return in time for WrestleMania. After the match, he was written off again for more time off.
This was the first WWE PPV since Elimination Chamber 2020 and the first WWE show of any kind since the following Monday Night Raw to have a paying audience since the COVID-19 pandemic of 2020-2021.