Bisexuality tends to refer to liking both men and women, and more practically speaking, many bisexual people simply have attraction regardless of gender, without a specific label changing that in any drastic way (e.g. they’re also attracted to some nonbinary individuals, for instance)

If you find yourself exclusively attracted to one gender, then you probably wouldn’t want to call yourself bisexual, because you only find yourself attracted to a single one, unlike what I think most bisexual people would say qualifies you as bisexual, which is attraction to more than one gender.