Yes, you can add unlimited additional public pages to Pagestead. The process is explained in detail in the following knowledge base article: https://support.sbpro.io/knowledge-base/how-to-add-additional-public-pages-to-sb-pro/
FAQ: Can I use a WHM/cPanel server to host Pagestead?
FAQ: What server / VPS and hosting company do you recommend we use to run Pagestead?
FAQ: How can I force Pagestead to use https/ssl?
FAQ: Why are my page and template thumbnails not being generated?
FAQ: Site and template thumbnails are not getting generated; why is that?
FAQ: Can I import existing sites into Pagestead?