Can you check if the unit of measurement on the gas entity is m3 or ft3? If not, try changing that. I think that dropdown filters on unit of measurement.
You can change the unit in the entity settings. Go to settings, devices and entities, entities, search for the entity, and then click it. You should get a pop-up where you can configure the unit.
Since you are measuring gas the measurement likely is already in cubic meters or feet, and for some reason the unit got set incorrectly.
Super weird! I can edit the unit just fine. I suppose cubic meters of gas could be converted into kWh since in the end it is just energy, but I’ve never seen a gas meter report its usage in kWh.
In any cased, if it lines up for you, great At least you’ll be able to see trends.