In a properly working gas oven, you will definitely see a pattern of blue flame all along the perimeter of the burner, plus an orange-red glow from the electric igniter. These are very distinct.
If the flame is getting insufficient oxygen, it will burn a smoky yellow.
The igniter is wired in series with the gas valve, so current needs to pass through the igniter in order to open the valve. In the most common failure of the igniter, it burns out like an incandescent light bulb can do; this "opens" the circuit (ie, breaks the current) so the gas valve won't open. A neat fail-safe design.
(And yes, the igniter remains powered and glowing as long as the flame burns; modern gas ovens consume a couple hundred watts of electricity for the igniter, even as the gas burns. It helps heat the oven so it's not wasted. Gas stoves for off-grid use have spark ignition systems that don't need constant power.)
What may be happening to your stove is that the igniter has partially failed so that it is insufficient to ignite the gas but still passing current to open the gas valve. So the igniter may be glowing to some degree, and gas is flowing, but not burning. Very dangerous. Like, quit reading this right now and go turn off the oven.
If your oven is kind-of-warm, it may be owing to some amount of heat coming from the half-working igniter, like there's a 100W bulb keeping thing warm.
Even if I'm off-base about the root cause, if you've got gas flow but no blue flame, you're in danger.
So quit using the oven and get service on it, from a technician certified on this brand, who can do the diagnosis and order the right replacement parts.
If you phone the gas company and report a suspected leak, they are likely to very quickly come and shut off the gas supply at the house...and then tell you to get a gas fitter to fix things and call them back. So you may have no hot water and no heat (perhaps not a problem in August) for days, while this gets resolved. In this case, if there is no suspicion of a leak elsewhere, I think the best advice is to quit using the oven, and get it serviced.