Dear Tran Cong Phuc1
Greetings!
Thank you for posting on Microsoft Community!
Based on your description, I understand MS Teams did not verify/warn your turn-in and we apologize for the inconvenience caused to your work!
I know it could be frustrating when missing deadline. Thus, thank you so much for bringing this into out sight and we do understand your concern about this feature that how it helps you to improve your efficiency in such daily busy work schedule but as it is related with Teams product design, so it is strongly recommended to submit your valuable feedback directly to Microsoft product development team by either go to Help from your dedicated App > submit Feedbackor by posting on Microsoft Teams · Community for feature requests.
Please note that nobody here are the product developers/decision makers and has no control over the product. Everyone, including us as community moderator, can only assist you on the query for providing available solutions and feature's availability status within our scope and capability.
To check more details about how to submit feedback, kindly refer this article Learn about how to provide feedback to Microsoft - Microsoft 365 admin | Microsoft Learn
At this time, your patience and cooperation will be greatly appreciated. I hope all the best!