Files and Folders will stay in the user's OneDrive Recycle Bin for 90 days then automatically be emptied.

https://support.microsoft.com/en-us/office/restore-deleted-files-or-folders-in-onedrive-949ada80-0026-4db3-a953-c99083e6a84f#:~:text=If%20you're%20signed%20into,administrator%20has%20changed%20the%20setting.