I think Reddit is tracking my phone?

I got permabanned from Reddit on my Android Google Pixel phone and whenever I would create a new account it would instantly get banned.

I tried reinstalling the app but it still banned my new account. I'm not familiar with App Development so I was curious to see if anyone could explain to me how they are tracking me and if I can do anything to get rid of it.

While on the topic of app development, I heard that apps can track more things about the user. For instance, there are ways an app can identify the IP of a user even if they are using a VPN but a website is unable to. Would appreciate if anyone could clear that up for me. Thanks