Are you asking "Is there anybody out there with the 2020 Rocket 3 R/GT Givi Panniers and Pannier brackets?" AND "When the brackets are installed, is the black cover left off or is it designed to go over the bags as a protective covering?"
FWIW - Hope you can see how the punctuation helps in shaping the sentence.
Let's eat Grandma! vs Let's eat, Grandma!