Recover deleted file from OneDrive shared folder

Hi,

I am trying to find a way to restore deleted file in OneDrive.... I had a user (userA) that had some folders/files on his OneDrive shared with some colleagues....  That user is not with company anymore...

Now, one of the user (userB) that has an access to his shared folder, deleted some files by mistake that she now wants to restore. How can I restore it?

As it is a shared folder from OneDrive, it looks that 

• the deleted file is not stored in the userB recycle bin... 
• when she goes OneDrive Online, go to the folder where she wants to recover the files (as it can be usually recovered when shared folder from SharePoint), there is no Recycle Bin visible at all
• when I - as an admin - create a OneDrive link for usarA onedrive and connect to it (in M365 admin->Active users->OneDrive), there is no Recycle Bin visible either

what is the way to recover the file in this situation? Just can't figure it out.