I get: [✓] Enable instant personalisation on partner websites. Note: instant personalisation is not yet available for you. The tick is greyed out, so I guess

I get: [✓] Enable instant personalisation on partner websites. Note: instant personalisation is not yet available for you. The tick is greyed out, so I guess it's not yet active. But I have no way of telling when it will become active, and no way of disabling it preemptively. Another reason to only log onto facebook in incognito/privacy mode.