Hi N,
You can turn in an assignment in Microsoft Teams. This will allow students to turning in their assignment after the due date, but you as a teacher should allow late turn-ins or if they asked for a revision.
Reference here: https://support.microsoft.com/en-us/topic/turn-...
Or if the students will reach out to you directly, there is an option to edit an assignment which allows them to extend an assignment's deadline or update its resources after you've already assigned.
Learn it from here: https://support.microsoft.com/en-us/topic/edit-...
I hope this helps, let me know if you need further help.
Best,
Jayzar