....didn't I just say EU? It's EU law.
Yes it is because it is relevant to the processing of your personal data, the only reason your account can be banned is because you give them permission to process your data so you can have an account in the first place; any kind of directed processing of that data needs to be logged and be able to be turned over when requested.
Lol, TOS? You think GDPR gives a shit about a TOS? You can't circumvent what is law with a terms of service, all of your personal data, and how it's been processed needs to be handed over when requested.