Is it possible to create a Codepipeline with source as CodeCommit in different region or different accounts?

Hello.

As stated in the document below, source actions (such as CodeCommit) do not support cross-region actions.
https://docs.aws.amazon.com/codepipeline/latest/userguide/actions-create-cross-region.html

You cannot create cross-Region actions for the following action types:

• Source actions
• Third-party actions
• Custom actions

To support cross-region deployment, CodeCommit and CodePipeline must be created in the same region, and CodeDeploy must be created in another region.