Archived Forms Not Found!

I was checking a form last created and modified in my archived forms but could not get it. I noted the last forms in the archived forlder are the ones modified in 2019.
Does is it mean my forms get deleted by the system based on the number of years they have been there? How do I recover such forms/data?
Thanks,

Welcome to the community, @maindah!

No, your survey project should not get deleted automatically by the system. It shall only be deleted if and only if you delete them manually.

Did you ever share your login credentials with anyone else? If yes, maybe someone who had the same could have deleted them.