Would be help also to Am6plus ? On kernel 5.15.119 (with HW acceleration) and also newer kernel it dont have mounted vendor filesystems on CE22NO (vendor filesystem is mounted only in NG).
AM6plus video firmwares (original firmware Android 9 V. 0.5.4 for AM6 Family):
video_ucode.bin (1.6 MB)
h264_enc.bin (74.5 KB)
GDC affine (FHD, 4K):
gdc.tar (80 KB)