Under 900 for the single core score, over 2000 for the iPhone SE. No custom kernel, but Lineage OS 15.1. You get a higher score if you use the custom kernel, assuming it still works.
WiFi calling might work on T-Mobile, I enabled it.
Buy the Mi Box for $60, and sell the Apple TV. Kind of pointless having an Apple TV, with no iOS devices. Do universal remotes work with it? Without a USB adapter?