The DA62 consumes JetA1 and not Avgas.
In this game JetA1 has a density of 0.80kg/l with Avgas at 0.72kg/litre.
However in the weight and balance section for this aircraft the fuel density is incorrectly pertaining as to Avgas rather than the JetA1 which it uses. Fuel weight is therefore lighter than it should be by around 10%.