Audacity: Nyquist plugins not working in audacity 3.0.5

dear OpenSUSE audacity users,

I’m looking for some help regarding using nyquist plugins in audacity. I’ve installed the official package for tumbleweed, v3.0.5.
In the ‘Preferences/Effects’ dialogue, the list of plugin types to enable does NOT include Nyquist (see https://paste.opensuse.org/70272278). Consequently, no nyquist plugin appears in the ‘Add/Remove Plugins’ dialogue (https://paste.opensuse.org/87882993).
Looking at /usr/share/audacity/plug-ins, the plugins are actually in place (https://paste.opensuse.org/33392699, the one I’m interested in primarily is named label-sounds.ny).

Any ideas what’s wrong here?

Thanks alot -
Karsten