It does seem to help with focus, but my attempts to curb adhd and brain fog happily didn’t stop at nicotine. Niacinamide (B3) seems to do much better job for me, without the smell, nausea, and it works longer.
You can't, and I've watched as they've added/removed UI to indicate that you can even press it. I'm glad the feature is there, but it's clear Meta doesn't want you finding it.
I checked twice in disbelief, but amongst many many places - London (UK) not being listed was surprising to me. I thought it's maybe some extra challenge of the oldest subway system.
What if that's just some illegal content that was reported? Even archived on purpose in the first place. Would that result in banning the whole domain?