The single row of radio station favourites is VW’s standard format and it was like that on previous generation MIB screens in the mk7 and mk7.5 Golf too. It’s like it in my 2020 Polo GTI+ as well and was the same in my previous 2016 Polo GTI.
Having more than one row of radio favourites on a single screen isn’t something I’ve ever thought about. The standard format doesn’t bother me - when I listen to the radio, it’s mainly limited to 2-3 different favourites and I’ve got them all on one screen (I dare say most owners will have their most listened to favourites on one screen too), so I have limited need to scroll to the next screen(s).