So, I am probably not the right person to answer this question but since no one else responded.
Both the newest pre-releases from @ayufan and Debian desktop (and minimal) OS images from @Mrfixit2001 have 3D and 2D acceleration.
These are two desktop images but there are plenty others - e.g. Recalbox or LibreELEC - OS images that make use of the GPU too for games and other media.
As for drivers, there isn't a Vulkan driver for the RK3399 ... at least not yet.
Both the newest pre-releases from @ayufan and Debian desktop (and minimal) OS images from @Mrfixit2001 have 3D and 2D acceleration.
These are two desktop images but there are plenty others - e.g. Recalbox or LibreELEC - OS images that make use of the GPU too for games and other media.
As for drivers, there isn't a Vulkan driver for the RK3399 ... at least not yet.