What a wonderful plugin

[chichille]

Incredible but true, i developed an addon for Elementor and I was just looking for sources to integrate the features you created.
To consolidate the code I had to make some contributions that I give you here because i don't have a Wordpress account.
Mon site de démonstration: EAC
Of course the download is free (GPLv2+)

Manager.php
Add action 'before_delete_post' to clean the DB

Method 'get_current_page_id'
Replace 'wc_get_current_page_id' by 'wc_get_page_id'

Method 'has_assigned_template'
Added is_category() et is_tag() to check the archive before is_tax()

Method 'update_template_location' check if 'show_on' is set
if ( in_array( $type, array( SiteHeader::TYPE, SiteFooter::TYPE ), true ) && isset( $settings['show_on'] ) ) { ... }
Force add_option autoloaded to 'no'

SiteHeader.php and SiteFooter.php
Export/import not working for importing a model
Method 'get_properties' added new property
'cpt' => [ 'elementor_library' ],

Method 'print_elements_with_wrapper'
Check the "DOM Optimization" experiment feature to avoid loading unnecessary divs
$is_dom_optimization_active = Plugin::$instance->experiments->is_feature_active( 'e_dom_optimization' );

PageLayoutSettings.php
register_post_meta: because $meta_name is empty 'Appearance/Widgets' is broken
Method 'enqueue_scripts' before loading the script i check the screen ID
if ( 'widgets' !== get_current_screen()->id ) {
...
}

Templates/BlankPage.php & SiteHeader.php
Added 'body_open();' after body_class();

Create new file compatibility-themes.php
For twenty of the most popular themes like 'Oceanwp, GeneratePress Hestia Astra Storefront Hello...'
I created actions before and after the header/footer to add the DOM structures corresponding to the current theme.
I'm not sure if this is the right method but...

And finally I test if the current theme is a block based theme to load or not the 'Header and Footer' features
because it doesn't work and I'm not familiar with block themes
if ( function_exists( 'wp_is_block_theme' ) && ! wp_is_block_theme() ) { load component } WP 5.9

I just finished the navigation menu and I still have some functionality to add like site title, logo, page title, breadcrumb...

Thanks again for your superb work.