I subscribed Apple Tv+ (free 7 day trial). I just needed to provide my personal data, email address and PayPal data. When I decided to cancel I could cancel the subscription on the Apple TV+ page, but when I wanted to delete the apple account in itself, I was forwarded to accounts.apple.com where I was asked to login first. When I tried this, I needed to enter my 2FA that I got by email and then I had to enter my mobile phone number for another 2FA. After that the screen that you can see in the reddit post comes up and I cannot proceed past it. I tried this process dozens of times with different browsers and configurations to no avail.

… I now sent in a GDPR account deletion request.