From another outsider:

• I think Taylor Swift is married to a player of one of the teams competing for the superbowl.
• She previously encouraged young people to vote (but not for whom), which would be bad for Republicans as they’re unpopular with young people.
• Right wing media cooked up a theory that the super bowl was fixed so the team of Taylor Swift’s husband would win, resulting in Taylor Swift being called to the victory celebration where she then would endorse Joe Biden.

As far as I take it from this thread, the team actually won, but the endorsement didn’t happen, confusing conspiracy nutters everywhere.