Semi-banned from instragram – Rights under GDPR?

I'm mostly out of my depth here and have no knowledge about this. I'll try to make it short and to the point.

I use my instagram account for posting pictures of my vacations and the occasional picture of some delicious food.

Sometime ago, my account was "muted": I can follow account and post new photos but that is it. I can't like photos, comment or even add comments to my own pictures!

I tried reading the FAQ but it was not helpful. I tried to ask for help using the in-app help and got nothing. I tried looking for an email to try and contact someone but never found a single email of contact.

Big corporations (instagram, facebook, twitter, ...) can do what they want and I know that I'm basically powerless in a situation like this, I accept this.

I'd like to open a new account (not sure if I'm really allowed to after having the first one "muted"), but without knowing why this happened, it might happen again. The thing is, I have no idea about what happened and since I can't speak to anyone, I have no way to know. So:

    Do you see a way for me to learn more about my situation? I'm not even speaking about saving my account,
    Under GDPR, as a European citizen, do I have the right to ask for this info? If so, how?