So I came across this, 30 meters <$60
4x10GB … 4 data pairs, like Displayport and thunderbolt.
I briefly looked for info on voltages, only see mention of voltages around 3.3 in this
Displayport or HDMI could be iffy with the varying data rate/pixel clock, but thunderbolt… ?
Looks like it could be as simple as a passive adapter (not HDMI, which is 5volt)… maybe. Oh, plus power to the modules on the ends of fiber cables.
EDIT: I suppose (I know for sure) for display, you’d need an EDID chip on the source side. Probably just rip one from a dongle that reports support for all the things.