He didn’t even want to buy Twitter, just manipulate the stock price by talking about buying it. Dumbass signed too much paperwork and waived too many rights, though, and found himself obligated to buy it anyway. Pretty sure he tried to fight it and lost.
So now he’s trying to not burn all his money, but he’s fucking terrible at it, so he’s just becoming a laughing stock.
There’s an actual process for it that’s underway. I don’t remember the details, but it’s approaching the final stages. So basically, Biden has in fact been working on it, he’s just doing it properly so it’s harder to overturn for petty bullshit republican reasons.