There hasn’t been a winner. All that’s been counted is popular voted and media predictions based on those. Said predictions are a very good indicator of who will win, so if the media across the board is saying its looking like Biden is getting away with 300 electorals or what the fuck ever, he’ll almost certainly be getting the win.
This is because America is not a direct democracy, it’s a republic, which means the popular vote is the people telling their representatives how they want them to vote, so come December when the official electoral votes are cast, unless an elector wants to lose their job and stain their career forever, they’ll vote according to the popular vote, but it’s not a guarantee.
Trump could end up with every single electoral vote and win 538 - 0. He won’t, but it’s a possibility allowed by the system.
So functionally it’s over and Biden is the winner, but it’s not official yet.