Apple Watch Ultra 2 won't unlock MacBook Air

"Apple Watch Ultra 2 won't unlock MacBook Air: I had an iWatch Series 7 sync to my account, and I could unlock my MacBook Air. Two weeks ago, I bought an Apple Watch Ultra 2, and I can't link it to my MacBook to be unlocked. I already unlinked the old iWatch from my account, but I still can't make the MacBook Air link with the Watch. MacBook Air M2 - macOS Sequoia 15.6 Apple Watch Ultra 2"

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Linking(Pairing) MBA with Apple Watch Ultra 2:

A. Use an iPhone, to Initialize the Pariing:

You need an iPhone to initialize the pairing; the macOS does not have this capability, as it is not mentioned in the device's site.

1. Go Here: Apple Watch Ultra 2 - Tech Specs - Apple Support
2. Scroll to: Compatibility
3. As it Reads: iPhone Xs or later, including iPhone SE (2nd generation or later), with iOS 18 or later

B. Minimum System Requirements:

1. Go Here: Continuity Features and Requirements for Apple devices - Apple Support
2. Scroll to: Auto Unlock
3. As it Reads: "If you're not sure whether your Mac supports Auto Unlock, press and hold the Option key while choosing Apple menu  > System Information. Select Wi-Fi in the sidebar of System Information. On the right side, look for ”Auto Unlock: Supported.”

Troubleshooting the Unlocking:

1. Go Here: Unlock your Mac with your Apple Watch - Apple Support
2. Scroll to: If you need help
3. As it Reads: If you're having difficulty getting Auto Unlock to work:

• Open System Settings (or System Preferences) and turn off the Apple Watch setting described in the previous section. Then restart your Mac and turn the setting back on.
• Install the latest macOS updates and watchOS updates.
• Make sure that your Mac isn't using internet sharing or screen sharing, which are turned off by default.