It’s only as awkward as you and the other person makes it, and you sound like you made it pretty awkward for yourself before even giving the other person a chance to be non-awkward about it.

If it’s something the person can fix immediately, like a downed zipper or food in their teeth or visible booger, tell them (discreetly) immediately. If it’s not fixable at the time, don’t draw attention to it.

And I dont know how “oh, you seem to have a zipper malfunction” could ever be seen as trying to hit on someone, so you’d likely have been fine if you hadn’t blown it out of proportion.