How to use HyperHDR without HDMI grabber in Raspi 5?

[ibaon]

Hi, for days I have been trying to set up HyperHDR on my Raspberry Pi 5 (currently running Retropie with Kodi and HyperHDR installed on the same device). But no matter what I try, I can never get a usable signal for HyperHDR. I tried software screen capture, which gives me a signal, but it's just a black screen. I tried the Hyperion Android Rebon Addon, which doesn't give me any signal at all. Furthermore I tried the Hyperion Android Grabber installed on my TV itself. While the last option does give me a usable signal, it only works in the menu. The second I play any media, I just get a black screen again, no matter if it is DRM protected content or not and no matter if I play the content on the TV or via Kodi from the Raspberry Pi.
Is there any way to use HyperHDR without an external HDMI grabber on a Raspberry Pi 5? Is it worth it installing Libreelec or will I run into the same problem again? Or is there any other solution?