Sharing a file is easy when looking at a file. However the email people get from it will have a notification-look, which may result in it being overlooked/ignored.
Because of that, you should avoid using that functionality if you want people to notice and read your email. A normal email with the link and instructions should be sent instead.
❌ Figure: Bad example - Sending an email with a file using the 'Share' functionality
❌ Figure: Bad example - The email sent has a notification-look meaning it may be ignored
See this file: {{ URL }}
-a
✅ Figure: Good example - Link and tasks sent in a regular email
Note: It is a good idea to review SharePoint and Teams stats and tell users not to use this funcionality by pointing them to this rule.