Most of mine are things like setting a default for things like wifi or Bluetooth devices.

I want my phone to connect to my home wifi and know it’s the home wifi? I want it to prefer that wifi to other networks.

I want my Bluetooth headset to stay connected to the device I’m currently using rather than changing to a separate device when that device is powered on.

I’m sure there are others but I think these may not be solvable without changing the way these devices handle connections in their firmware.