block_has_support( WP_Block_Type $block_type, string $feature, mixed $default = false )

Source

File: wp-includes/blocks.php

function block_has_support( $block_type, $feature, $default = false ) {
	$block_support = $default;
	if ( $block_type && property_exists( $block_type, 'supports' ) ) {
		$block_support = _wp_array_get( $block_type->supports, $feature, $default );
	}

	return true === $block_support || is_array( $block_support );
}