I started this as a comment, but it started getting long, so here goes.
Without more detail and pictures, I would recommend calling in a local expert to look things over, just on the basis of not having you taking a half-baked, uninformed guess from an anonymous person on the Internet as a reliable answer.
Having said that and meaning it...
Is there a control lockout feature on your stove? That would prevent it from supplying gas to the burners (leaking gas into your residence) after a power loss.
Is there a gas valve on the stove itself that got turned?
Otherwise, you probably just have the gas shutoff valve for the stove turned off. Typically (unless it's old), a gas valve will have a yellow handle or knob, or possibly a red or plain brass one. But it will tend to be a valve that rotates just 90 degrees rather than a round knob that you turn multiple times to open or close the valve. Although, it could be a rotary valve.
If it is a newer 90 degree valve and installed correctly, it will be open if the handle is aligned with the pipe, and closed if the handle is perpendicular to the pipe. Although, another caveat, there are also valves built on elbow fittings. I've attached a couple of example images below.
Offhand, it sounds like there just isn't any gas getting to the burners on your stove. Any link to the bidet is probably incidental, since you already know that you were turning both water and gas supply knobs around the house trying to make the water stop. I doubt that your bidet has its own gas supply, and the "flexy tube" is probably just water, right?
You should have a separate gas valve for each gas-fired appliance, somewhere close to the appliance. You have to be able to turn the gas off for just the stove so that it can be disconnected and removed (maintenance, replacement, etc.) without turning the gas off for all the other appliances in the residence. The gas shutoff valve for the stove should be somewhere near the stove so that if you disconnect it, you aren't evacuating all of the gas in the line between the stove and the main gas valve into the residence.
You could easily have the main gas supply valve open, have the gas valve for the water heater open, but have the gas valve for the stove closed.