Still no, this isn't done upstream with private spaces either to my knowledge.
Discussion
Damn shame, thinking of going back to work profiles for that reason
Stock justifies Private Spaces as a separated space used to hide apps from people, so it somewhat makes sense why they don't do that.
It is a weird design decision since the fact a private space is set up wouldn't be invisible to forensic analysis. It could be looked at but as a low priority compared to other work.