I'm still puzzled to this day

Hey guys first time poster here

So I don't even know how to feel about this I matched with this girl about a month ago on this dating app and we get eachothers social medias and the day after she had plans to meet up with a friend and stuff for an exam but it's been a month now and there's no activity on any of her social medias no snap score increase no insta followers no activity nothing like she just vanished or something

Advice would help

Edit: Maybe she ghosted me, but not having any activity on any social media is crazy