Hyper-fixations on people

So hyper-fixations tend to come with ADHD, as well as OCD.

I get hyper-fixated on things like music and food… but also people (like crushes). It gets to a point where I’m stalking them on social media and find details about their life even though we’ve never spoke and don’t have any mutuals.

Basically my questions are: If there’s an obsession (with a person), would this come from the hyper-fixations from ADHD or OCD? Are these hyper-fixations or obsessions normal?

I’m not diagnosed with either, but I’m planning on getting tested for ADHD and one of my tell tail signs are my hyper fixations. I’m also a shy and quiet person so I wonder if my obsessions I have on the low stem from that and not able to make friends/connections.