Adding new custom fields on sales order page in Fusion SAAS application

Summary:

We are exploring on options to add new custom fields on oracle sales order page at both header and line levels.
Are there any other options to do so other than EFFs and DFFs?
We even touch based on application composer but could not find sales order in standard objects.

Can you provide some options to achieve the same.

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Oracle Fusion Cloud Applications 24B (11.13.24.04.0)

Code Snippet (add any code snippets that support your topic, if applicable):