Hello Kamikatze,
we have exactly the same problem right now - we wanted to buy a Bosch dishwasher, but the IKEA planner could not guarantee that the installation would work. I called Bosch, they said you need a fully integrated dishwasher with a Vario rail, and there is only one model. It is an XXL dishwasher, meaning it is at least 86.5 cm high and adjustable up to 91 cm in height. It is quite expensive - during research on the internet today, the cheapest price including delivery was about 610 euros (Bosch model SBE 65 NOO EU).
However, the IKEA planner said that with BEJHAPLIG you could also install a normal Bosch fully integrated dishwasher, but as mentioned, they would not commit to that definitively. Maybe it would be interesting to catch a fitter who has already assembled METOD kitchens for IKEA and installed third-party devices. Unfortunately, I have not managed that yet.
If you find out anything else, please let me know, I am grateful for any information.
Good luck with the kitchen planning.