Lenovo has at least introduced a bunch of AMD laptops in the Thinkpad lineup this year. T495, X395, E595, E495 at least. These correspond to T490, X390, E590 and E490 which come with Intel CPU.
You'll have a while to wait. Ryzen 3xxx APU and mobile chips use zen+ on 12nm. Zen 3 launches early next year, so you'll probably have to wait until then for zen 2 mobile chips.
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