Link project invoices to sales orders

Link project invoices to sales orders

As a business owner and project manager I create estimates with my clients which then become sales orders.

When billing for project work I want to invoice against the agreed sales order.

I see that I can create invoices and link them to sales orders in Zoho Books but this feature seems to be missing in Zoho Projects integration.

I would like to request that feature to improve accounting in the Zoho ecosystem.