Cloudflare gateway working methodology

Does cloudflare gateway work on DNS setup alone. If the DNS addresses, DNS over https, Dns over TLS is setup on a windows or Android then does that mean the gateway is now fully configured to work on these devices??
Also, If the zero trust browser feature(which runs the browser codes in a remote location) isn’t activated do the website codes get scanned for threats by the gateway to block malicious domains in real time?