You also have a right to have access to the data they used to make the decision to ban you, and an explanation of it in a way a reasonable person could understand.

Articles 13–15 provide rights to 'meaningful information about the logic involved' in automated decisions.

Discord is american; and Anna's github says she's in Michigan. She's not covered by EU laws.

I did a GDPR complaint because GitHub locked me out of my account because the 2fa failed. It took the dutch authority 18 months for them to decide they couldn't be bothered to make GitHub provide my data. GitHub also lied and claimed my repositories weren't personal data even tho my name and email are all over them. Also if you talk to your agency you can't actually appeal the decision because your agency didn't decide anything, they have to follow it on to the agency that is responsible for that country based on which country the company is based in.

Well, there go my hopes.

This might have been downvoted because it seems the user in the US, and the company is also in the US. GDPR doesn't seem to apply here. Or maybe you were being sarcastic by saying "state data protection authority", but it's not obvious enough.