If the bisexual person in question were accused of something relevant to the bisexuality . Yes.
This non binary persons non binaryness, appears to manifest itself mainly in the womanly wearing of womanly clothes. He's just half inched some poor woman's undercrackers.
Ergo, relevant and acceptable
If you were talking about a shoe thief, their foot fetish would be very relevant.
Also sexuality is a stable sexual or romantic attraction towards a particular ( or both ) SEX and real.
Whereas gender is stereotypes and bollocks... I mean a social construct.