Odd that there wouldn't be a public explanation for this. Poking through board_config I found support for the A10X (T8011), and for the three Apple Watch chips,

Odd that there wouldn't be a public explanation for this. Poking through board_config I found support for the A10X (T8011), and for the three Apple Watch chips, but not for the new A11 SoC (T8015).