Fuel Gauge - mileage range stuck on visual display both mileage (415) and level increments

Morning all

Have a 73 plate (October2023) hybrid petrol Skoda octavia 1.0L .

Filled up last week before Christmas and notice range read 400 miles - usually around 440

Then after driving it started to go up and reached 415.

Have driven locally over the holidays and the range still shows 415 miles.

So I filled up this morning £17.00 13.01L (and have noted mileage 6996).

The range reading is still 415.

Any ideas on the issue and how to resolve?

Thought I'd get the heads up before talking to the dealers.

I know I have approx 400 miles ..range but obviously need a car that tells me how full the tank is !!

Cheers

Pee Cee