How reliable are the fuel economy figures shown on MiD?

Was wondering how reliable are the fuel economy figures shown on the MiD display. Currently driving Hyundai Grand i10 Asta AMT Petrol bought in Nov 24. Being an AMT i’ve heard the fuel economy will be on the lower end but i’m getting around 15-17kmpl in city traffic (City - Indore) and 20-22kmpl on highway drives which is at par with Manual transmission. Gear changes at 2k and mostly RPM below 2.5k Pic 1 - Highway drive of around 50km. 4people AC on auto at 24.5 and cruise control set to 90 RPM around 2k, got around 20-21kmpl. Pic 2 - After 1st service did a reset to all the figures and since then its showing an economy of around 16.1kmpl. Pic 3 - One day of city driving covering 74kms within the city (Indore) AC on auto at 25 getting 16.8kmpl. The average fuel economy gauge shows around 15.8kmpl. While doing a tank to tank on a highway drive returned 19.4kmpl. How reliable are these figures and how much is the expected fuel economy from a 1.2litre NA engine ?