Hi
In pro version you can use the block editor for inner pages only since homepage sections are coming from the theme options panel. If you want to use the block editor for homepage as well then you need to use the static front page.
To enable the block editor for inner pages go to Appearance >> Theme Options >> Basic Settings >> here you can enable gutenberg editor. Please see the attached screenshot.
https://imgur.com/a/l3F4z5H
Thank You