Thank you.
What I was trying to explain is that, like this document(https://docs.databricks.com/ja/data-governance/unity-catalog/create-metastore.html)
External location (created manually), register your credentials and
after creating the S3 bucket from the account console,
I wanted to know how to edit it after creating the S3 bucket from the account console.

Can I edit the following after setting up as attached?
・change the bucket path
・Can the edited contents be reflected in the same IAM role?
・Change to a newly created IAM role

Here is what we have tried
・I could not edit the bucket from an external location.
・I was able to modify another IAM role credentials, though,
・The metastore screen of the account console did not reflect the changed IAM role.