For inner pages of all of our themes Elementor page builder works just fine. For SKT Elements Pro theme pack they are built using Elementor page builder so homepage is also editable using Elementor.
For SKT Guten Pro (gutenberg editor is used). For SKT Perfect theme pack (SKT Builder page builder) is used for homepage editing. For other themes customizer or theme options is used to edit the homepage.
However for all inner pages you can use Elementor, Beaver Builder, Brizy, Gutenberg blocks, Visual composer or WP Bakery etc.