WordPress Gutenberg - Control allowed blocks by post type

control-blocks-by-post-type.php

<?php
add_filter( 'allowed_block_types_all', function($allowed_block_types, $block_editor_context) {
    if ( $block_editor_context->post->post_type === 'post' ) {
        return [
            'acf/my-cool-block',
            'core/paragraph'
        ];
    }
    return $allowed_block_types;
}, 10, 2 );