@automattic/calypso-products/src/is-jetpack-tiered-product.ts

This module contains information about the various products sold within calypso, such as product slugs, plan intervals, etc.

import { JETPACK_TIERED_PRODUCTS } from './constants';

export function isJetpackTieredProduct( productSlug: string ): boolean {
	return ( JETPACK_TIERED_PRODUCTS as ReadonlyArray< string > ).includes( productSlug );
}