jattdontcare wrote:
I used to be able to unlock my macbook pro (2015) with my apple watch but recently it hasn't been working. I checked my settings and the option has completely dissapeared. I made sure my wifi and bluetooth is on for both devices and the two-factor authentication is on aswell. I tried restarting both devices but nothing is working out.
https://discussions.apple.com/content/attachment/13f2c0d3-770d-433c-9522-77eb0240f1a1
You do not say what exact mac
what exact macOS
what exact watchOS
Does this Mac have touchID ...?

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Look under Touch ID & Passwords
ref: Unlock your Mac with your Apple Watch
Unlock your Mac and approve requests with Apple Watch - Apple Support
>System Settings > Touch ID & Password. turn off then on the option to allow Apple Watch to unlock(?)
No resolve sign out of your Apple Account on your Mac > System Settings>AppleID/Account
and back in again and compare your results
ref: Sign in to or out of your Apple Account on Mac - Apple Support