A web-based tool in Microsoft 365 that enables users to quickly create surveys, quizzes, polls, and feedback forms.
Dear Huong _637,
If you just make the new account as a collaborator, it doesn't mean that he owns the form. It just shares the form with another account. The form is still associated with the for creator account. If the form creator account is deleted, the form will be deleted as well and the collaborator will not access the form.
Are MS Form collaborators also co-owners? - Microsoft Community
Unless the collaborator accesses the collaboration link and duplicate it as his own form by clicking on Share as a template.
Then the form becomes the collaborator's form and will not be deleted.
If the collaborator doesn't do that, he will not access the form. If the account is deleted and the collaborator doesn't do that in your environment, the next step is to contact the related team to see whether they can help you recover the form from their side.
We have a specific channel trying to help the users recover their lost data in Microsoft 365.
If you aren't the administrator, I suggest you contact the administrator in your school and let him follow the steps in Get support - Microsoft 365 admin | Microsoft Learn to open a support ticket to our related team as soon as possible.
About admin roles in the Microsoft 365 admin center - Microsoft 365 admin | Microsoft Learn
How do I find my Microsoft 365 admin? - Microsoft Support
The administrator should be able to open the support ticket from Help & support in the Microsoft 365 admin center.
Then he can select the Phone support or the Email support as follows.
Thanks for your effort and hope that the data can be soon recovered by our related team.
Sincerely
Cliff | Microsoft Community Moderator