MWUAHAHAHAHA! Through necromancy m technomancy, and other dark arts I have all 5 displays working off of the Lenovo Legion Pro 7 (heretofore I will refer to as the 'Legion 7' because ain't nobody got time for all that typing [and inevitable typos].) That's:

The in-built display, the two primary displayport displays, the two tertiary displayport displays and the sole HDMI display that has my HomeAssistant dashboard.

Got all my network drives mounted. Physical ones tomorrow. I am slowly getting towards 'moved out' of the desktop. Final step is to clone the main drive -- secondary is fine as is -- and swap the NVMe drives into the laptop (the Legion 7 came with 2x1TB, my desktop has 2x4TB. Because mere mortals could actually buy those back then....

I am incredibly pleased with this (and by this I mean getting all 5 display working on the Legion Pro 7).
And yes my desk is an absolute wreck. In my defense I keep pulling wires and shit out. Later in the week my job is to pull everything out and redo all the wiring. I also need to move some shit, I can't get to the tools that are behind the laptop now. But the external drives in tbolt dock will go there.

PS - I got so excited that all of them work that I forgot to rotate the orientation on the two tertiary displays.

@tankgrrl brava!