Control Ps4 Pro with Samsung remote control?

Have the HDMI device connection and HDCP on my Pro. I activated Anynet + on my Samsung Q80T (2020 model). Unfortunately, I can't control the Playstation with the remote control. What am I doing wrong? All smart functions are deactivated.

Do you have HDMI-CEC enabled on the PS4? (Don't know if you have to do that, for example with the FireTV Stick you have to) Do you use a cheap cable? (Even had problems with ARC and a Samsung cable)

So the HDMI device connection, i.e. CEC, is activated on the PS4. Oh, that the cable could be the problem I haven't even considered. I will still test it!