I know your pain! (Cries in Nvidia laptop) when i bought mine i literally couldn’t find a laptop with AMD graphics in my region.
There is some hope these days. In addition to the previously mentioned Frameworks laptop, there’s also this TUXEDO Sirius 16 - Gen1. (Tuxedo is a German company specializing in Linux-compatible computers). It might not be exactly what your looking for, but AMD graphics laptops are so few and far between I thought I should put it out there.
Why did they have their own builds of these projects in the first place? Did they have custom patches they maintained?