Just a little thing, but I've often thought this information would help with Channel Collection, curation and overall maintenance.
...or a hover bubble? A display toggle? Anything?
Some of my Collections are meant to match up with their FAST source (Pluto, Stirr, SamsungTV+, etc.) so in lieu of a new feature that would synchronize such channel additions and removals automatically to their matching Collection, simply being able to compare by the amount of channels displayed here, would be useful and convenient.