Pixel 3 / 3 XL icons change
For the moment you camt. However, there is a modified version of the Pixel launcher, Rootless Launcher that can use icon packs


  Features:
  
  
  Search bar at the bottom
  Wallpaper based theme selection
  Regular Icon Packs
  Adaptive Icon Packs, such as my Google Icons
  Icon Shape selection on Android 8.0