Yes that's what I meant, whereas in the UK I would say advent calendars are ubiquitous for children. When I was growing up, they were about £1 and all the same - a cardboard sleeve with a plastic inner, on the outside printed some Christmas type scene or a popular children's character. You'd get a small moulded chocolate shape, with a Christmas-themed picture behind the door each day. Up to about the 1980s it was common for them just to be a picture behind a door.
Germans really seem to get into the advent calendar thing and you can find one for anything - wine, skincare, spices, books, children's toys, children's bath bombs, toddler snacks (fruit pouches, puffs etc). They don't seem to just be for children but for everyone. There are chocolate ones, but they are much more fancy than the UK offerings, larger in size and each day will be a mini chocolate bar or figurine or so on. They seem to cost about €7 (which seems so expensive to me for an advent calendar!)
The cheap basic chocolate + picture ones can be found in Germany, but they don't seem to be the "default option" - you sometimes see them in Aldi and I've come across them in the Euroshop. Whereas in the UK, they used to have about half an aisle in every supermarket throughout November dedicated to the cheap chocolate ones in every theme imaginable. All the currently popular characters, and then the major chocolate bars (Cadbury, Mars, Bounty etc). I think the last time I was in the UK they seemed to be about £2-3.
I know that you can get these other types of advent calendar in the UK too but they seem to be a newer thing of probably the last 10-15 years. So I don't know if the German market has always had those things or whether they are also newer here.