Lack of "acceptable high end" Zen 2 laptops is my gripe too. From what I understand, it is following 2 reasons;

1. Intel/nVidia Contracts have OEMs their hands tied (which explains capped GPU in most Zen 2 laptops).

2. Lack of widespread Thunderbolt 3 support on AMD.

While I'm fully bought on reason 1., reason 2. is still hard to digest as one can still ship laptop with USB-C port supporting PD and DisplayPort (w/ alternate mode) and call it a day, and most users won't mind. I hope Zen 3 causes the power shift on laptops.