I think I had it at one point but now I can't figure out how I did it. When I modify the island cabinets and go to countertop it only lets me specify a right and left overhang and not a back overhang. How do I do that?

I'm doing a kitchen remodel and want an island where there is a slide-in range. I'm going with Ikea cabinets and am looking at an island where there are two sektion cabinets next to a slide in range and there is an overhang of countertop for seating in front of and to the right of the range. I'm wondering if this is possible with the Ikea Sektion line. Has anybody done this or have any suggestions as to what I should do? Do I buy custom cabinets? Any guidance is appreciated.

Here is the design of the island https://imgur.com/mzLYnPp

On a previous post I asked how to transform a cabinet into a kitchen island but then got told it was better to use Metod, so this is my plan now.

I would like to have two Metod cabinets (80x60cm) joined by their back sections, with a wooden countertop of about 120cm so it has about 60cm of overhang that I want to use as an eating area with some stools.

My questions are the following:

1. What can I use to support the overhang? What kind of legs and that sort of stuff

2. How do I fix everything together?

3. What additional details and stuff do I need to take care of? I think raising the cabinet a couple cms would be nice, and covering with some panel below, but I don't know if IKEA has something that's reasonable made for this purpose.

I want to try to keep it on a budget as much as possible. I am moving to a new apartment that has some space but lacks counter surface and storage area in the kitchen hence the need for the project, but as I am spending a lot also elsewhere I don't want to go super expensive on this.