Taylor Swift and Travis Kelce faked everybody out -- despite making a splashy NYC appearance this weekend ... they're nowhere to be found for a key football game.
There was a lot of speculation that the couple would show up in person Sunday to watch the Jets-Eagles game at MetLife Stadium in New Jersey ... y'know, to root for Travis's brother, Jason Kelce, seeing how he's a starter ... plus, Taylor herself is a known Philly fan.
GETTIN' SERIOUS TMZ.