Issue of the topic: Trying to configure zwave stick, port ttyACM0 is not listed as available
File /dev/ttyACM0 does not exist. Configuring ttyAMA0 as the zwave controller port does not work as zwave controller (aeotec Z-Stick Gen5 model ZW090-C) is unable to get online status.
Plugging the zstick directly into a Pi4 will not work because the zstick dies not follow the usb specification. The port shuts down to prevent hardware damage to the Pi.
A workaround is to use a USB 2 hub between the Pi4 and the zstick.
The permanent solution is to use a usb certified device that meets the specifications.
Thank you @Benjy. I understand that there is a design flaw on the hardware of the Aeon Labs Z-Stick Gen5, not being able to pass usb certification program. Fortunately the workaround of connecting though an USB hub worked for me.