You can design a custom 404 page using Custom Layout module available with Astra Pro. Please refer document, to begin with, Custom Layout module.
Selecting a 404 page layout will replace the current 404 page content with custom layout content.
You can design 404 page with any page builder.
Options available for 404 page layout-
- Disable Primary Header
- Disable Footer Bar
You can decide a user role for which custom 404 page layout should be visible. You can add more than one user role with Add User Role button.