how to make RSS not only in 

Simple Blog

in Typesetter CMS?

how to make RSS not only in Simple Blog in Typesetter CMS?

Based on which data? New pages, page changes, deletions?
 

all pages!     New pages, page changes too!

It shouldn't bee too hard to adopt SimpleBlog's RSS generator to build a feed out of pages.
I only fear that it will be much more difficult to define exceptions for cases, e.g. when simple typo fixes shouldn’t trigger a new feed entry. Or for pages that you don’t want to be part of the feed at all.