remaining fuel

[apwapw]

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?

[autopilot]

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.

[apwapw]

Pulled up at petrol station today.
ColorMFA showing 15L remaining fuel.
Filled up 45L
After filling up, ColorMFA shows 53L remaining.

So, what's happened to the missing fuel?

[autopilot]

I have already answered this question for you. It's not difficult for me to repeat.
ColorMFA does not measure fuel level. ColorMFA only shows what the cluster has measured.
Write to VW technical support and ask why the cluster does not measure the fuel level correctly.