That first image is from Zen 2 launch if the URL is to believed. It was added and then removed pre-launch. You're going to be very disappointed if you're hoping the bios update next year will bring PCIE4 to 400 series.
Allegedly even that will be supported.
Surprisingly the Baseline Boards will have the biggest "benefit".
Although, I am Not certain If there are even more up-to-date information about that..
Wouldn't make Sense to me If that doesn't include "full Zen 3 capability Support"
Based on the whole debacle with 400 originally being dropped I wouldn't expect any extras like SAM on those boards.
Might come to zen 2 down the line, but not much to go on there.