To start with, we need to check if a Menu item is available for the service charge. If not, please be advised to set this up to be included in the earnings, refer below article for more info:
What are the different menu item types available?
Once a menu item for Service charge is available, make sure it is not a part of any Qualification criteria which could exclude this from earnings. By default, if it is not included in any QC, guests will be able to earn points for the service charge as well.
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)