Since that maintenance, Expo's eas build service has been failing. When attempting to sign into my Apple Developer account, I get the following message:
Authentication with Apple Developer Portal failed! Apple provided the following error info: Service not available because of maintenance activities, please try again after some time.
Having same issue
I got the same issue. Not sure whether it's EAS or Appstore.
I was able to fix this issue by re-installing eas-cli: npm install -g eas-cli
I had the same issue, but this morning I updated the EAS to a new version, and then I was able to submit normally.
npm install -g eas-cli fixed the issue for me
The Expo team released a fix via the EAS CLI. You’ll need to update to the latest:
npm install -g eas-cli
This solved it for me.