Why is Approval Hierarchy Not Available for the Expenses Module in Zoho Books?

Why is Approval Hierarchy Not Available for the Expenses Module in Zoho Books?

Hello,
I noticed that Zoho Books allows us to configure approval workflows and approval hierarchies for modules such as Bills, Vendor Credits, and Invoices.

However, the same approval hierarchy option does not seem to be available for the Expenses module.

Is there a specific reason why expense transactions do not support approval hierarchies? Are there any plans to add this functionality in future updates, or is there a recommended workaround for organizations that require manager approval before expenses are recorded?