As always, there are a lot of features coming out or being enhanced in the Teams client. Loop components is one of the new cool features released this spring. This is a feature allowing for better collaboration within a chat object.
A clever eye will notice that Loop components in a chat is stored as a file in the chat, and you don't need the Teams client to access the file. As long as you have the link (and access rights) you can access it through any web browser.
You can read all bout the feature in this post, and check out which Loop component controls an admins can change.