I checked OrangePi Plus2E, but everything works fine.
Tried plus2e image on my Orange Pi PC and it worked.
After some research it turned out that CONFIG_REMOTEPROC_SUN6I_AR100 in u-boot is enabled for orangepi_plus2e but not for orangepi_pc.
The reason is that in this commit: https://github.com/LibreELEC/Libr…0b9c2db50a03683
projects/Allwinner/patches/u-boot/0012-DO-NOT-MERGE-sunxi-Enable-remoteproc-on-H3.patch
is replaced by
projects/Allwinner/patches/u-boot/0011-DO-NOT-MERGE-sunxi-Enable-remoteproc-on-some-H3-boar.patch
which enables AR100 only for Orange Pi One and Orange Pi Plus2E.
After enabling AR100 for Orange Pi PC, it works fine too.