Be aware of the behavior that the notified email has not sent to the owner even [Notification] tab is enabled.
I would like to inform that the notified email is not sent to the owner even the setting is enabled for "Anonymous access link created or modified" within the "Notification" tab in the One drive admin center. In addition, even if I created an anonymous access link or modify a link, the owner cannot get the notified email.
I hope the function will be implemented to send the email to the owner as soon as possible.
I was looking for this functionality as well.
It used to be that the file owner could get an email notification that their file had been shared, but that control seems to be gone from the portal now. Or if it is there, I can't find it.
I do know it worked up until somewhere around April 2017.