I believe you’re describing the bitrate display that used to be present on Cam v3’s Live Stream screen, but this and other features no longer appear there following recent changes to that Cam’s UI:
You may want to check out that topic and leave your comments about the changes there and in the survey that’s linked in the initial post. You might also be interested in this Wishlist topic where the same thing has recently been discussed:
As with any Wishlist topic, you can visit that one to click or tap the Vote button above the initial post and share your ideas and use cases in the comments to show your support for the product and feature request/suggestions that are important to you.