How confident are you?
In the first instance, I would ask her for some time to talk over something. In that private meeting between the two of you , I would do the shit sandwich approach, start by saying something nice, if you can think of anything you could thank her for a agreeing to meet with you.
Then, the meat in the sandwich, you have noticed a couple of comments (make sure you have a written record of the sayings that you can give her) and wondered whether there might be something that you (you, not the manager) need to address for the sake of good working relationships.
Let her say what she needs to say. Or agree to break off and get back again soon
Finish up with some more flannel and thank her again.
If there is a problem, this is what she as line manager should be doing, not making sarky comments. You doing it might remind her of that and open the opportunity to sort whatever it is out. Or remind her that she needs to be a better manager. Or discover that she just has a different sense of humour inappropriate
It takes something to have these kind of conversations. If you can manage to do so without showing in your time of voice or facial expression what you really think, then it can be transformational.
Then, if you don't get anywhere you can reasonably pass it up the chain or to your representatives. Good luck.