So going back to this, I was trying to get this information from a server I didn't have access to other than WP login.
Now I have access and I see:
root@server:~# wo site info domain
Information about (domain):
Nginx configuration wp wpsc (enabled)
PHP Version 7.4
SSL enabled
Does it mean this website uses WP Super Cache? If so, why is it I see:
Cache Contents
WP-Cache (0KB)
0 Cached Pages
0 Expired Pages
WP-Super-Cache (226.28KB)
225 Cached Pages
0 Expired Pages
When I check WP Super Cache plugin on WordPress? I am struggling to understand how wpsc works hand in hand with the WP website and what change/setting required on the WP side of things?