If someone realises that they have mistakenly backed a terrible, damaging, destructive ideology three years previously, then the human and honest thing to do would be to give a thoughtful and considered apology. Lolz and 'it was crazy' is not that. She has directly contributed to harm done, and has specifically attacked women who tried to stand up for women's rights.
To Riley Gaines, on womens' sport:
'Maybe if you channeled all this anger into swimming faster you wouldn’t have come in fifth.'
https://x.com/AOC/status/1982882637376303280
To Nancy Mace on objecting to men using women's facilities:
''This is not just bigotry, this is just plain bullying,' Democratic Rep. Alexandria Ocasio-Cortez said.'
And again:
'Lastly, we wouldn’t need to talk about bathrooms at all if we acted like adults, washed our hands + minded our own business instead of trying to clock others. Going by track record, I’d feel safer in a bathroom w/ a trans woman than a powerful male executive any day of the week.'
https://x.com/AOC/status/1087121559444172803
She then called a gamer on Twitch to help him raise money for Mermaids.
https://variety.com/2019/gaming/news/alexandria-ocasio-cortez-hbomberguy-twitch-stream-1203114042/