Cool project. Not sure I'd use it, as my iPhone works quite well for this purpose. iPhones have had always on display since the 14 Pro and 17, and they've had good water resistance since forever. No problem reading it under any conditions.

  - iPhone 15 Pro with quadlock case 
  - various Quadlock mounts 
  - Quadlock mag charging mount with a USB C battery in the top tube bag for long rides
  - Apple Watch (paired to SRAM Powermeter on bike)
  - Record rides using Apple Fitness on Apple Watch
  - Apple fitness syncs to Strava and other services
  - Ride With GPS, Apple Maps, or Google Maps for turn-by-turn (when necessary)