The new kitchen will be from Ikea

I definitely find it better that way, if it is feasible.

I meant a floor plan showing the position of the connections. The drain cannot be moved arbitrarily far to the side, otherwise the pipe will not have enough slope.

With a tankless water heater, you always have hot water.

A front from Ikea can also be mounted on a high-lift flap fitting.

Please explain for dummies in this field...where do I get something like this??

I hope it is doable, the installer can probably tell me that??

No, I don't always have hot water, this is a 5l under-sink boiler, when the 5l are empty I have to wait a bit or can this simply be changed??

Please explain like I'm a dummy in this field...where do I get something like this??

In the IKEA planner, there is a floor plan view and you can also enter the connections. The images can be exported.

I hope it's doable, I guess the installer can tell me that??

He should be able to.

No, I don't always have hot water, this is a 5-liter under-sink boiler, when the 5 liters are empty I have to wait a bit or can this simply be changed??

Yes, with a tankless water heater instead of a boiler.