In what ways can he track my IP address through Instagram?

I used to have an OnlyFans and I promoted it through a fake Instagram account using an email under a fake name. This guy who was insisting on meeting up claimed he can track my IP by back logging it even if I delete the Instagram account for good (which I did) is this possible? If so, how can I prevent it? And how can he do this? Also, what would he be able to find?
In what ways can he track my IP address through Instagram?
Post Opinion