I tried USB-connected (with USB-SATA adapter) slot-loading DVD (without mechanical eject button).
I can normally read from it, but cannot eject it and cannot play CDDA.
I tried eject with screenbar module - volume disappears from system, but DVD disc stays in drive,
right-click menu above DVD icon do nothing,
with shell eject command I didn't succeed.

Which device I have to select with eject command or player CCDA settings?
Corresponding usb device cannot help here - as one device serves for many devices.

Please, do you have any idea how to do it?

Tested with MorphOs 3.15, Pegasos2, Efika, Powermac G5Quad.
When connected to windows, it ejects without problem - so drive is OK.