> docks that offer 3+ (simultaneous) screen outputs ... requires DP
Still incorrect.
What you actually have to use is two thunderbolt ports on the MacBook. Then you can power not just two but four 6K screens, as each TB port can push 2 externals (in addition to built-in screen).
So this iVANKY dock is native TB quad screen, for example:
https://www.amazon.com/FusionDock-Thunderbolt-Monitor-Dockin...