I can not find the "Slicer Radiomics" in 3D Slicer in my mac

Hello,
I just downloaded 3D Slicer on my mac “Ventura 13.2.1”, but I am not able to find “SlicerRadiomics” in extension manager.
I downloaded both “stable” and “nightly” versions 5.4.0 and 5.5.0. but still unable to find this extension.

I am a beginner user of 3D Slicer and I would be appreciated if you can help me out how to add this extension.