I using the Timber Starter Theme for my website and would like to group multiple blocks through the Gutenberg block editor. Unfortunately, the group option isn't available. I'm wondering what needs to be activated for the option to become available.
Based on this article I tried to explicitly allow core/group, but this didn't make any difference.
So my assumption is, that I need to activate the whole functionality for the theme. Similar to add_theme_support( 'post-thumbnails' );
but my research about it was unsuccessful so far. I'm grateful for hints about it.
allowed_block_types_all
filter can be used to replace the list of blocks allowed, a lot of the time the list is a true/false value and only contains a list of blocks if another plugin or theme has tried to enforce a strict list