DOLBY ATMOS Content on Xfinity

Can anybody direct me to where there is actual DOLBY ATMOS content on Xfinity X1 itself? Like ON DEMAND (not on apps like DISNEY+,HBO, or NETFLIX?)?

Use Dolby ATMOS with Xfinity X1 - Xfinity Support

It supposedly, supports it, but I can't find one example of it anywhere. Older forum posts suggested talking into the remote and asking for it, but they brings up nothing.