The project does not have an eligible event or expenditure item

I have attached the seeded Billing extension Percent complete Revenue and Invoicing to Project, also attached the automatic events to this seeded billing extension, and using Distribution rule 'Event/Event' the PRC Generate revenue program is not creating revenue and showing rejection reason The project does not have an eligible event or expenditure item,

for these seeded billing extensions still developer need to code and call seeded billing events?

please assist if any setups or steps missing here, thanks