ColorMFA

2.8L V6 Bora technical data shows fuel tank 62L including 8L reserve.
But when I fill up, ColorMFA only shows 53L.

I can't find anywhere to adjust.
Does that also mean my distance to empty is incorrectly displayed?

ColorMFA does not calculate the current fuel value. The dashboard sends this data already in liters. You can check how many liters the dashboard sees in the diagnostics (dashboard) in group 2. Calibration of this value is not provided in ColorMFA. If the value is displayed incorrectly, you need to look at the parameters and calibration of the dashboard.
The distance to emptying is calculated by the fuel in the tank and the current consumption.