use_block_editor_for_post_type filter always returns page or post as post_type

[dingo_d]

I'm trying to enable the core editor only for one post type on a client project (want to transition to blocks piece by piece). So I've added the use_block_editor_for_post_type filter, and set:

<?PHP
  /**
   * Register hooks
   */
  public function register() : void {
    add_filter( 'use_block_editor_for_post_type', [ $this, 'disable_gutenberg' ], 10, 2 );
  }

  public function disable_gutenberg( bool $use_block_editor, string $post_type ) {
    if ( in_array( $post_type, [ 'post', 'page' ], true ) ) {
      return false;
    }

    return $use_block_editor;
  }

And I check posts, and pages, they don't have GB (which is what I want). But my custom post types, which have editor enabled, also show classic editor.

So I added an error_log in the filter and all the $post_type variable value when I'm at the new page of the CPT is page (except when I'm on a post, then it's post).

Is this a bug or?

[dingo_d]

My bad, I didn't notice that show_in_rest parameter was set to false in my CPTs 🤦🏼‍♂️