We have repeatedly discussed our interests in an OS VM manager since 2022, but when this can be done is yet to be decided.
https://nitter.projectsegfau.lt/GrapheneOS/status/1678594436924600325#m
Backup when Nitter shits itself: https://twitter.com/GrapheneOS/status/1678594436924600325
It would also be nice to run a nested variant of GrapheneOS in a VM to isolate apps. Plus Android provides a Chromium layer-1 sandbox as an OS feature to every app via isolatedProcess services. It could be desirable to move this to per-site VM instances using microdroid. It'd be a large and difficult project but with very high impact for web browsers.