I recently learned that my organization has had a fourth band (near infrared) in our ortho imagery for the past 10 years. I had no idea; that would have been useful information to know.
Yes, it would have been nice if the imagery supplier had informed staff of the near-infrared band data. But also, it would also be helpful if Pro could indicate that there are additional bands that are not currently displayed.
For example, a note or symbol in the Contents layer indicating that other bands are available:

Or something better.
Related: