[NikkiA]

Tweets were geolocated, with a 'see tweets near me' page until about 14 years ago, so it's entirely feasible that at least some of that infrastructure has survived the feature being removed.

[mindcrash]

"Tweets near me" was based on people sharing geolocation with Twitter (one of the things you can opt-out of when setting up your profile).

I didn't share any geolocation with Twitter. At least not voluntarily.