Odroid N2 only black picture with DolbyVision while generic S905X3 works

MediaInfo says:

Video
ID                                       : 1
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main 10@L4.1@Main
HDR format                               : Dolby Vision, Version 1.0, dvhe.08.03, BL+RPU, HDR10 compatible / SMPTE ST 2094 App 4, Version 1, HDR10+ Profile B compatible
Codec ID                                 : V_MPEGH/ISO/HEVC
Duration                                 : 41 min 9 s
Bit rate                                 : 6 079 kb/s
Width                                    : 1 918 pixels
Height                                   : 802 pixels
Display aspect ratio                     : 2.40:1
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0 (Type 2)
Bit depth                                : 10 bits
Bits/(Pixel*Frame)                       : 0.165
Stream size                              : 1.75 GiB (80%)
Default                                  : Yes
Forced                                   : No
Color range                              : Limited
Color primaries                          : BT.2020
Transfer characteristics                 : PQ
Matrix coefficients                      : BT.2020 non-constant
Mastering display color primaries        : Display P3
Mastering display luminance              : min: 0.0050 cd/m2, max: 1000 cd/m2
Maximum Content Light Level              : 851 cd/m2
Maximum Frame-Average Light Level        : 291 cd/m2

Neither with 20.2 stable nor with 21 daily image I get a picture. After reading CoreELEC and Dolby Vision I get the impression that the N2 is not a licensed device for Dolby Vision.
But what makes me wonder: My Tanix TX3 plays this file fine, with the same settings (using hardware accelaration). Could it be that such a generic device with older S905X3 is licensed while Hardkernel’s N2 is not?

It’s probably just playing Hdr10+

Found this from 2019…

TANIX TX3 now with the new Amlogic S905X3 SoC
Dolby Vision optional HDR, HDR10 +, HDR10, HLG and PRIME HDR support

I was considering getting the N2 myself but ended up getting the Ugoos am6b+, at the time I wasn’t that bothered about DV but now I watch a lot more DV than HDR.