To add a new payment requirements to your plugin, you use register_payment_requirements. This is an example from WooCommerce Bookings

booking-payment-gateway.php

<?php

// Somewhere in includes/blocks/class-wc-bookings-gateway.php

/**
 * Returns an array of supported features.
 *
 * @return string[]
 */
public function get_supported_features() {
	return array( 'products', 'booking_availability' );
}

booking-store-extend.php

<?php

use Automattic\WooCommerce\Blocks\Package;
use Automattic\WooCommerce\Blocks\Domain\Services\ExtendRestApi;

add_action('woocommerce_blocks_loaded', function() {
 // ExtendRestApi is stored in the container as a shared instance between the API and consumers.
 // You shouldn't initiate your own ExtendRestApi instance using `new ExtendRestApi` but should
 // always use the shared instance from the Package dependency injection container.
 $extend = Package::container()->get( ExtendRestApi::class );

 $extend->register_payment_requirements(
	array(
		'data_callback' => 'inject_payment_feature_requirements_for_cart_api',
		)
	);
});


/**
 * Check the content of the cart and add required payment methods.
 *
 *
 * @return array list of features required by cart items.
 */
function inject_payment_feature_requirements_for_cart_api() {

	// No bookings in the cart, no need to add anything.
	if ( ! Pseudo_Booking_Class::cart_contains_booking() ) {
		return array();
	}

	// No booking in cart that requires availability.
	if ( ! Pseudo_Booking_Class::bookings_require_availability() ) {
		return array();
	}

	return array( 'booking_availability' );
}