It can be anything! An apex, subdomain, or even a URL.

Results forwww.backendapp.cloudsysnetwork.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2022-05-21T13:25:50.057	2022-05-21T12:25:49	2022-08-19T12:25:48	www.backendapp.cloudsysnetwork.com	www.backendapp.cloudsysnetwork.com	C=US, O=Let's Encrypt, CN=R3
2022-05-21T13:25:49.717	2022-05-21T12:25:49	2022-08-19T12:25:48	www.backendapp.cloudsysnetwork.com	www.backendapp.cloudsysnetwork.com	C=US, O=Let's Encrypt, CN=R3
2022-03-20T14:22:41.551	2022-03-20T13:22:40	2022-06-18T13:22:39	backendapp.cloudsysnetwork.com	www.backendapp.cloudsysnetwork.com	C=US, O=Let's Encrypt, CN=R3
2022-03-20T14:22:41.034	2022-03-20T13:22:40	2022-06-18T13:22:39	backendapp.cloudsysnetwork.com	www.backendapp.cloudsysnetwork.com	C=US, O=Let's Encrypt, CN=R3