What happens to actions referencing InvocableMethods without a specified category?

When actions referencing InvocableMethods do not have a specified category, they are classified as 'Uncategorized.' This classification occurs because Salesforce uses categories to organize various actions in a structured manner, making them easier to find and manage within the system. If an InvocableMethod lacks a defined category, it cannot be grouped with other actions that share common characteristics or functions, resulting in its placement in the 'Uncategorized' section.

This mechanism helps maintain a clean and organized environment within Salesforce Process Builder or Flow, allowing users to quickly identify and utilize actions based on their categorization. By not having a category, the actions remain isolated, emphasizing the importance of defining clear categories for easier navigation and management of actions within the platform.