In the US your ratings scale will be MON as opposed to RON, but they measure different things.
The 8V 1.8T EA888 Gen 3 engine doesn’t advance the timing, unlike the S3 so 87 MON (roughly equivalent to 95 RON regular) is fine. That said, I always used super unleaded 97-99 RON in my 1.8 (equivalent to your 93 MON premium) but that was my choice.