According to dev comments it's still in the works, just waiting for Vulkan support (I know it was mentioned during one ISC or Friday Q&A, maybe on Spectrum as well). Depending on how fast the porting work goes we might see some movement on that be the end this or early next year (though that's just my speculation).
I'll see if I can dig up an official comment.
Edit: Here's a Spectrum post from 2022 from Silvan, the main (?) graphics guy. I'm pretty sure the video comment was newer than that but I don't have time to trudge through those right now.