Amazing idea and motivation for a project, I really hope it works out!
This very topic was discussed a while ago (complete with a speculative pinout!), no confirmed reports though. Framework internal display connector to DP port?
There’s also more discussion on the inverse of what you asked, going from an external Framework screen to usb-c. I vaguely remember some off-topic posts in here though, so feel free to scroll and see if it’s what you want: HDMI controller board for display panel - #15 by nrp
- EDIT: found it HDMI controller board for display panel - #71 by iLambda
- pinout seems to be the same with a few unconnected wires. If the connector will fit this is what you’re looking for!