Question about dictation for Microsoft Teams wherever you would normally have to type

Hello, let's say that your team has an employee in it that finds it increasingly having difficulty using a keyboard due to a medical condition. 

In this situation the employee would rather be able to talk to type (dictation) in Microsoft Teams anywhere they would normally have to type (in chats, Team Channel discussions, etc).

I am trying to find out if this is available but most of the articles online about this are talking only about during a Microsoft Meeting (also some articles about dictating directly within Word).

Is this available for Microsoft Teams?

Our organization uses MacOS for our operating system for all of our computers if that is important to know.