Docs
Summary
After adding chargebee button on the Object like Opportunity page layout, it is not displayed in Classic/ lighting view.
Solution
If you are using dynamic actions ; please follow the below steps:
Go to an Opportunity > Click gear icon> Edit page
Click on the highlight bar and check the actions added
Add the action to this list and try again.
Reference : [[screenshot assets/images/Billing/ea9XlOwSwmLj0lggnnImGNsg2g2unErP9Q.png] Help And Training Community](https://help.salesforce.com/s/articleView?id=sf.lightning_app_builder_create_dynamic_action.htm&type=5)
Articles & FAQ