Hello Steve06!
I think you have probably already compared the dimensions of the cutout for the cooktop of about 27 x 50 cm with the factum outer dimension of 39.8 x 60 cm and the estimated inner dimension of 35.8 x 56 cm.
At Siemens home appliances there are exact drawings for this device for installation with the minimum distances, etc.
Just as a note and OT. I simply find it great with Siemens home appliances that you can find all the necessary information including the operating manual directly and without much effort immediately and that it is available. Ikea still has a lot of work to do in this regard. Because so far I have never been able to find corresponding documents for IKEA appliances at IKEA. Expecting the consumer to somehow find out under the IKEA name how the device is called at Whirlpool is a scavenger hunt and has never led me to the desired information... and in my opinion it is the worst kind of customer service. But back to your question.
From the minimum clearance areas (cutout width 27 cm plus 4 right plus 4 cm left = 35 cm) everything should fit. Only you absolutely have to make sure there is sufficient rear ventilation. So the factum cabinet directly against the wall at the back is out of the question! But in any case I would
NEVER push the cabinets directly against the wall. It is always advisable to keep a distance of 5 to 10 cm between the rear wall and the cabinet. Keywords are: sockets, cooker boxes, faucets, water drain, etc. If you attach solid wooden battens along the entire length to the kitchen wall at the right height, it is also much easier to screw the cabinets at the back. Another effect very important to me is that you get a significantly deeper and thus better usable countertop. And always remember to let the countertop protrude at least 3 cm in front of the fronts, otherwise spilled soup runs directly from the countertop into the drawers!
Furthermore, I would basically make the two upper drawers into a single one. At Ikea you can get connectors for the drawer fronts (nicely ask service: "I lost this at the sink base cabinet!" oops: these parts are not available for purchase like that or order in advance from Ikea service, they will be delivered free of charge by post, but it takes 2 to 3 weeks). With that you can screw the two upper drawer fronts together as one. This is intended by IKEA for the pull-out under the sink.
This way you can create a tall drawer for taller cooking utensils and even keep the necessary minimum distance between the cooktop and the drawer.
Good luck. fotokatze