wp-calypso/client/lib/jetpack/is-jetpack-cloud.ts

import config from '@automattic/calypso-config';

const jetpackCloudEnvironments = [
	'jetpack-cloud-development',
	'jetpack-cloud-stage',
	'jetpack-cloud-horizon',
	'jetpack-cloud-production',
];

const isJetpackCloud = (): boolean => jetpackCloudEnvironments.includes( config( 'env_id' ) );

export default isJetpackCloud;