With the latest release, LibreELEC 11, hardware acceleration seems to work now! 🎉
How did you make it run? I tried just burning it on SD and USB drive, the box did not boot at all (no HDMI signal). Then I tried putting rk3328-h96-max-plus.dtb and adjusting extlinux config to use that file, this failed in the same way.
This image: LibreELEC-RK3328.arm-11.0.3-a1.img