There's currently a red area around Mexico City. I googled "gps jamming mexico city" and found a couple of interesting links. There are reports from pilots about GPS issues at the airport going back years [0], and a recent news article claiming that car thieves are using jammers to prevent detection [1].

[0] https://www.aviationtoday.com/2017/01/31/are-gps-jamming-inc...

[1] https://www.economist.com/science-and-technology/2021/05/06/...