Standalone gui client?

I am trying to run the Nextcloud client on a window manager (icewm) without a “desktop environment”, i.e. no “task bar”.

How can I start the client for configuration?

I found a greyed-out icon in the bottom left screen corner that works - somewhat.

Still, the question stands - what is necessary to run the client directly?

Look in this files. The .desktop seems to be the start configuration.

https://packages.debian.org/bookworm/amd64/nextcloud-desktop/filelist

list for Debian or Ubuntu