The UK is heavy reliant on gas heating currently so only a small fraction of electrical energy on this graph is used for heating. With the switch to heat pumps and other forms of electrical heating the picture will change.
The switch to heat pumps will be glacially slow. I’ve had a look at doing it on my property and my mums and gave up due to the need to change the pipes and radiators. I suspect only new-builds will go that route for a long time.
Not sure how it is for other parts of the world. Maybe places with heat pumps like Norway are different? We have a lot of gas for heating.