last time i tried, i didnt get the standalone mode to run.. there seems to have been an update in february, so i will give this another try when there's time..

(context: https://github.com/bernhard-42/vscode-ocp-cad-viewer/)

data point: standalone mode worked just fine for me a couple of weeks ago on an M4 MBP. Hadn't tried before so can't say if something got fixed.