Glee was a revolutionary show for LGBTQ+ representation, but it still had some pretty biphobic moments that were never properly addressed.
However, the show did end up earning some bi-points with its characterisation of Brittany S. Pierce, an openly bisexual cheerleader who has relationships with men and women throughout the show.While some people do temporarily identify as bisexual before identifying as gay, that doesn't mean bisexuality doesn't exist.