No HDMI Audio over Radeon R 285/380

It is called troubleshooting - process of elimination - finding the root cause …

Well - that points to other issues with your setup and configurations.

Raising your voice won’t help.

Why do you asked fo my headset

To confirm speaker-test works with working hardware
Also to show a “base-line” terminal response with working hardware to compare with defective hardware

On my system I have a monitor with built-in speakers connected via HDMI
and aplay -l shows the model number of the monitor

card 2: NVidia [HDA NVidia], device 3: HDMI 0 [HL247HGB]

Using speaker-test to check this device in ALSA, the terminal response looks like this:

$ speaker-test -Dhw:2,3 -c2 -l2 -twav

speaker-test 1.2.10

Playback device is hw:2,3
Stream parameters are 48000Hz, S16_LE, 2 channels
WAV file(s)
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 2048 to 16384
Period size range from 1024 to 1024
Using max buffer size 16384
Periods = 4
was set period_size = 1024
was set buffer_size = 16384
 0 - Front Left
 1 - Front Right
Time per period = 2.687588
 0 - Front Left
 1 - Front Right
Time per period = 3.007972

If I disconnect the TV, then it will be no HDMI-Connected device there

Test was to find out if the Asterisk (suggesting HDMI output is defective) is always present in ALSA or if the fault clears when HDMI output is disconnected