If your domain is already connected to Potion, then there are some different steps to go through in order to connect to Super. Subdomains connected to Potion can also cause a problem connecting to Super. For example, leaving the root domain or subdomain on Potion will prevent it from being connected to Super, even if the DNS settings are correct.
In this case, please remove the domain/subdomain from Potion and as Potion to remove your domain from their Vercel account. Once this is done, you will be able to complete the domain connection process in Super.
Troubleshooting domain connection issues
If you run into issues, please make sure that you have:
Added new DNS records to your domain provider
Removed old DNS records
Waited up to 24 hours for new settings to propagate
💡Use this tool to check if the records are set up correctly: https://www.whatsmydns.net/