I learned about the equilibrium constant. Now, I've seen that the equilibrium constant of burning is extremely small $(K \ll 1)$. here, I have a question. you see, $K$ is still NOT 0, which means that the forward reactions happen at least a tiny bit. Then, shouldn't we see some parts of anything burning at least a little bit?
but I don't. Am I misinterpreting $K\gg 0$ or missing something?

No, you are not misinterpreting the concept of an equilibrium constant or missing something.

The fact that $K$ is very small for the combustion reaction does indeed mean that the forward reaction happens only to a very small extent in comparison to the reverse reaction, which is why most substances do not ignite spontaneously under normal conditions. However
Why is it that when I use a lighter, for instance, that things don't catch fire spontaneously all around me? Shouldn't the equilibrium constant $K$ for the carbon combustion be big enough for that to occur? I was told that I could calculate the amount of fuel needed for a car engine, assuming that everything burns completely and at constant pressure, knowing $H$ (enthalpy of combustion) and $K$ and by