In its most inclusive definition, a bisexual person is attracted physically, sexually, affectively and romantically toward more than one gender (man, woman, non-binary, agender, etc.) or toward a person no matter their gender. From one person to another, the importance given to gender identity can be great, small or non-existent. Gender identity isn’t seen as an obstacle to attraction.

Sources:

Bi.org (2021). What is Bisexuality? https://bi.org/en/101/bisexuality