I noticed that, but it lists only 37 plugins, not 200+, as advertized here: https://steampipe.io/ I figured the remaining 163+ might be built in, instead of being supplied as plugins.
I expanded more on this at https://news.ycombinator.com/item?id=28229700.
Having said that, we find plugins are quick and fun to write so we'd love contributions or suggestions for any that would bring you value!