Add this snippet to your plugin's main file to declare compatibility with Woo "Features"

woo-features-compat.php

/**
 * Declare Features compatibility.
 */
add_action( 'before_woocommerce_init', function() {
	if ( ! class_exists( 'Automattic\WooCommerce\Utilities\FeaturesUtil' ) ) {
		return;
	}

	// HPOS (Custom Order tables) compatibility.
	\Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility( 'custom_order_tables', plugin_basename( __FILE__ ), true );

	// Cart and Checkout Blocks.
	\Automattic\WooCommerce\Utilities\FeaturesUtil::declare_compatibility( 'cart_checkout_blocks', plugin_basename( __FILE__ ), true );

} );