Gu_tally has a prototype which seems to be working with some workarounds, but he’s busy with his dissertation right now and will hopefully continue on the project in one or two months.
You can also take a look at this OcuLink eGPU works with the Dual M.2 expansion bay module - #136 by Echelon
Which is a 4i Oculink via the SSD expansion bay and M2 to Oculink adapters. It’s a bit more funky, but at least available right now.