what is "Relay (Beta) in iCloud/password/relay (Beta?)

click here ➜ About iCloud Private Relay - Apple Support

iCloud Private Relay is designed to protect your

privacy by ensuring that when you browse the web in Safari, no single

party — not even Apple — can see both who you are and what sites you're

visiting.

When Private Relay is enabled, your requests are sent through two separate, secure internet relays.

* Your IP address is visible to your network provider and to the first relay,

* which is operated by Apple. Your DNS records are encrypted, so neither

* party can see the address of the website you’re trying to visit.

* The second relay, which is operated by a third-party content provider,

* generates a temporary IP address, decrypts the name of the website you

* requested, and connects you to the site.

Basically its Apple's version of a VPN.