Two ovens on one circuit – electrician installed only one circuit

I just spoke with the electrician. After initially trying to deny it, he did actually admit that he apparently dropped the ball there. The plan does exist. However, he also said that supplying an additional line is "impossible." Then he suggested tapping the line from another device. There are still three other protected lines in the row (dishwasher, Blanco water treatment system, and refrigerator).

Now I'm stuck between the opinions "It's okay" and "Absolutely not permissible."

And I'm no wiser than before... What to do? Am I the one who got screwed and have to live with the botched job? That can't be. o_O

Blanco water treatment system

Something like a Choice All? That also consumes about 2kW when heating up.

Dishwasher

Also somewhere on average between 1.2 and 2kW here.

Refrigerator

With a newer device, you are only at 0.1-0.3kW. ==> I would then share the circuit with the refrigerator. Everything else is the same as currently with two ovens.

Now I am torn between the opinions "It's okay" and "Definitely not allowed".

Refrigerator is okay or rather the second best option besides a completely new circuit.

The refrigerator is already okay or rather the second best option besides a completely new line.

It is not permissible. What one makes of it is up to oneself. Please stop giving recommendations here as an electrical layman. Because unfortunately, you have no idea.

Hi,
"Impossible" is not the case at all, of course he doesn’t want to pay for the dismantling and reinstallation of your kitchen.

However, you are not keen on the action either, the kitchen won’t get better because of it...

He can forget about connecting it to the dishwasher, they can sometimes draw 2kW or more when heating.

Blanco water treatment system??? I had to google what that is first... If that is the heating version, it will draw quite a bit more than 2 kW. (Side question, how do you actually protect these things from a child or visitor getting scalded mercilessly??? A faucet that looks normal suddenly serves me boiling water?!? WTF??? That’s almost deliberate bodily injury?!?)

That leaves the refrigerator. They only draw a few hundred watts, but at the moment of starting up, they also draw more, depending on what kind of motor is installed in the compressor. Whether these peak loads will still work well together with the oven? That will depend on the appliance combination.
What are the connection ratings of the oven and refrigerator?

Best regards,

Andreas

(...)
There are actually three more protected lines in the circuit (dishwasher, Blanco water treatment system, and refrigerator).
(...)

You will definitely overload your circuit with that, because even the refrigerator with its 200, 300 watts is too much when the oven with rapid heating requires its full 3.6 kW.
What is installed there anyway? 3x1.5? 3x2.5?

Who is providing the refrigerator with its own dedicated protected circuit?