Dear HS Computer,
Thanks for posting in Microsoft Community.
First, my pleasure to assist you.
As per your description, please don’t worry, we can work together to narrow down and resolve the situation.
It seems when you open your Microsoft Form and you found that the share button is missing from your side.
If my understanding is right, for the situation you encountered, we do understand the inconvenience caused and apologize for it. And I just tested from my side, and it seem I get result as like you described above, there is no share button in Microsoft For, even I created a new Microsoft Form from scratch.
If you are using work/school account and in order to share a Microsoft Form to another user, you may click on Collaborate or Duplicate> and under Share to collaborate you can get link and share with other users via email.
For your reference article:
Share a form or quiz to collaborate
Your understanding and patience will be highly appreciated. I hope that you are keeping safe and well!
Sincerely,
Waqas Muhammad | Microsoft Community Moderator