Hi Aliasgar,
Electrician itself built with sp pagebuilder and template based on Helix3 framework.
With Helix3 based themes you can create many positions to suite your needs. See https://www.joomshaper.com/blog/a-detailed-guide-to-the-helix3-layout-manager
About pages like Home, About: these pages created using SP Pagebuilder :), if you’re new with sp pagebuilder, just take a look documentation here https://www.joomshaper.com/documentation/sp-page-builder/sp-page-builder-2-x
