> HDMI goes 25'+, no problem.

Yep. That's likely because that's an active cable. Active DisplayPort cables exist, too. Here is one vendor selling active UHBR10 cables [0]. If you don't NEED UHBR, then you'll find your selection to be much, much larger. I've been using some Monoprice-branded 50 and 100 ft active fiber-optic HBR3 DisplayPort cables for years with no problem.

[0] <https://www.bhphotovideo.com/c/products/displayport-cables/c...>