If you are currently synchronizing prices to Agoda based only on the price for "1-2 persons" and "3 or more persons," you can switch to synchronization based on "additional person pricing" by following these steps:

Access the 'Channel' from the Admin Console, select 'Agoda', click on the '+' next to the property name to expand options, and open the 'Setting' screen for the relevant plan.

Enable the setting for "Enable Extra Person Price based price sync" by turning it on, then save and proceed to synchronize.