Did TikTok put malware on my phone? (Serous)

Ok hear me out for a second cause i know that sounds crazy but i was scrolling today tiktok showed me a post from a kid in my English class and had a pop up asking if i knew them and wanted to follow them. I don’t have a screenshot cause i got kinda freaked out and closed the app but the pop up said smth like that. The thing is I didn’t give it access to anything like contacts, and I’m not following anyone I know irl on any of my accounts, so I have no clue how they knew I knew her. They also only have limited access to photos and I’ve only ever given it access to art-making footage so it can’t be facial recognition or anything. It never asked to use my location either, and when i looked it up it says apple apps need to ask user permission to access their location.

This isn’t the first time something like that happened either - when I first downloaded the app it asked if I wanted to give access to my contacts, and when I said no, a pop up appeared suggesting friends from my contacts even though I didn’t give it access.

Does anyone who knows more abt tech than me know if this a glitch with Apple giving them access, or if it’s actually just taking it from my phone? Or is it a legal loophole or smth? Or am I just being paranoid lol