Is there any way to create Descriptive Flex Fields in create payee page?

Summary:

In Fusion Cash Management's ‘Create Payee’ page, we have limited fields to enter and could not see any options like DFFs by enabling.

Content (required):

In Fusion Cash Management's ‘Create Payee’ page, we have limited fields to enter and could not see any options like DFFs by enabling.

Please suggest:

a. Is there any way to add additional fields for Payee creation?

b. If multiple payees need to be added, is there any way to add them through a spreadsheet (by including additional details) or any suggest any API?

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

23B (11.13.23.04.0)