Yes you can grill on a uds, IF you have the upper u bolts like the Big Poppa smoker kit.
I built my own uds but bought the Big Poppa basket. It comes with all the hardware for smoking and searing. ( or grillin )
I start about 3/4 of chimney, get about 3/4 going in the chimney.
Basket with diffuser setting in the sear spot.
Burgers set up of a bit of indirect.
Flipped them and moved to direct.
2 with cheese for me.
Lettuce out of the garden.
Onions out of my garden and waffle fries.
Money shot? Maybe?
Thanks for lookin.