If you restrict the chat feature with messaging policy in Microsoft Teams, other features such as file sharing, sticker, or Praise will be hidden as well as the chat feature.
But, we would like to restrict only the Chat feature while remaining other features.

Since if you restrict the chat feature with Meeting policy, you are not able to use file sharing.
So, we would like you to enable us to restrict only chat feature while we could use other features during a meeting like we do share files while Channel meetings.