After you submit your thesis is a good time to get one last burst of feedback from your supervisors. Chances are that in the run-up to submission you could only get direct feedback on what you were writing – thoughts only on the piece that you gave in that day or that week.
After your thesis is finished, when everyone involved has time to let it settle, time to think, then you can get considered feedback on your research and thesis: what have you done well? What could you have done differently? Is there anything you have to keep in mind about your work?
These questions are basic of course. After your thesis is finished, when you’ve had time to think, you can ask much more valuable questions to get much more valuable feedback on your research and thesis. Take time to reflect: what would help you the most?