I would definitely changw your password, also see if you can check the logs of login as it will sometimes show and you can see if the country aligns.
For what its worth, if you think youre not being hacked. It sometimes ive seen it come up when people use a vpn and are connected by some sort of app. And it flags a 2fa to reconect. Its unlikely but i have seen it.
My guess is either your location or notifications. I’m guessing the first assuming the site isn’t just an outright scam.