"Black bishop on white square" How can a black bishop be on a white square? Is this a typo or a troll?
Opposite colored bishops and knight for White side VS bishop on white square and a knight for Black
Not a typo. Why can't there be a black bishop on a white square? Just like in a new game, you have two black bishops; one on white square the other on black squares. It's completely normal. If you don't think so please don't try to answer my original question.
Anyway I believe I found the answer already. I plugged in a few positions in engine vs engine play and found a few that seem to lead to a mate.

It's just that your question is improperly worded, it should be; oposite colored bishops and both sides have a knight. The fact that your question starts with "two" I'm just going to ignore because if white has an extra bishop then white would win. However to answer your question if both sides are of an equal position and of equal skill then it is a draw if no pawns are involved.
Is this 100% draw or is it possible for any engine to win, perhaps with 7-men tablebases?