They apparently do, I just looked at the regular Apple Music app on my laptop and there are quite a number of selections, plus they indicate you can play them on a full system using the ATV, so Jbrunwa is correct, if you can get it to the ATV you can play them from the existing Music app. This from the Music app:
"When you’re listening to classical music in Spatial Audio with Dolby Atmos, it’s as though you’re in the concert hall, standing side by side with the conductor, awash in the magnificent sound of a full orchestra. It’s a three-dimensional listening experience, one in which every detail and every instrument feels clear and close—from the swell of a string section to a virtuosic wind solo to the thunder of timpani and every vibration of the hammer. Handpicked by our editors, this playlist brings that listening experience to life with a selection of known pieces as well as those you’ve maybe yet to discover."