CE 19.4 Matrix HDMI extractor, switch, splitter - No picture

Hello,

Such an extractor/HDMI switch is attached to the LG HDMI arc2 input. Several devices are connected to it, because of my old amplifier.
Under the CE 19.4 matrix, the FHD or 4K image is not displayed, when starting the movie, the signal does not go to the HDMI input of the TV ARC2.
What to do? I read somewhere that different screen resolutions should be included under CE? Can someone help me in detail?