Your understanding is correct. Although, you wouldn't find Navi 22, 23 or 24 in the list because those particular architectures are not supported. Instead, you'd see Vega 10, Vega 20, Arcturus, Aldebaran, Aqua Vanjaram and sometimes Polaris.

We're working on a few different strategies to reduce the binary size. It will get worse before it gets better, but I think you can expect significant improvements in the future. There are lots of ways to slim the libraries down.