On Canyon's USA site, when I plug in to Canyon's sizing calculator your 181.5 cm height and inseam of 86, if says:
You are exceeding the recommended adjustment range of the specified seatpost. Unfortunately, we cannot ensure a proper fit on this bike.
Please select a different model.
This is for what I assume is their 2021 model and showing most sizes available to US after April 26, 2021. Whether earlier models were significantly different geometry I don't know.
Based on your height alone, the geometry tables suggest a "M" medium frame with a 556 mm top tube. It's not a very aggressive geometry and has a high stack and high stand-over compared to other bikes I recently looked at for myself.
Best bet in my opinion is try one or two on in person and get opinion of another that is with you. Does Canyon have any bikes in shops there? Here they are mostly mail order/on-line purchase. Personally, if I didn't have prior experience on a road bike to know what I do and don't like about sizing, then I wouldn't buy online.