So there's enough on-panel evidence for you to label America as a lesbian. But not enough to call Mystique bisexual? I'm really not seeing the distinction.
There is actual on panel evidence of Psylocke scissoring Cluster. But that's still not enough for you to consider her queer.
Who are you to decide whether a character counts? How many women do Psylocke and Mystique have to screw until they're queer enough for you?