What laptops are available in market powered by AMD Ryzen 4000?

There are quite a few models listed on AMD's website [1]. Though, when I click on them I'm redirected to what looks like an error page. But you can probably just check the model names on the manufacturers' websites. I myself heard good things about the Lenovo Flex 5 [2].

[1] https://www.amd.com/en/shop/us/Laptops

[2] https://www.lenovo.com/us/en/laptops/ideapad/ideapad-flex-se...

Hard to say. newegg.com's parametric search had just two last time I checked. Each had half a dozen variants, but none of them had the combination of features that I wanted. One of them was marked as sold out. At the time, a Google search came up with an article with some information about three or four others, one of which I found had been discontinued. Maybe next year, if I still care.