Yes. Every attendee can share their screen during a Teams meeting.
To share your screen, just click the present icon: 
and you can present any of your screens OR you can just present a specific document or application that you have open.
Check out this article for an in depth look at how to share content: https://support.office.com/en-us/article/share-content-in-a-meeting-in-teams-fcc2bf59-aecd-4481-8f99-ce55dd836ce8
