Although these aren't a part of the selected categories for the 15% off sale, the code still works for both items. The Apple TV (4th Gen) 32GB is much cheaper here if you can find any in stock, however it's still the cheapest I can see listed;
The Apple TV 4K 32GB has been cheaper in the past, but I haven't seen many deals after the $199 deal since November last year. This is still the cheapest I can see listed currently;
Update 1: Apple TV 4K now out of stock, have amended the title. Original link here.
Update 2: Back in stock, have changed the title.