Add shortcut to Google Drive file on iPad home screen - iOS 14,2

I have a file on my Google Drive and want to create a home screen shortcut to that file. I accessed the file in Safari on my iPad and turned link sharing on and made the file available offline. However, I don't see an option to add a shortcut to my home screen. All I see are the options in the attached screenshots. I don't see how to copy the URL shortcut to my home screen. Thanks.