Problem: The client is developing a function and needs a list of all active currencies set up on their site but cannot find a filter to retrieve this information. Solution: First, we recommend checking our list of WCML hooks to find the appropriate hook for retrieving active currencies. You can find the documentation here: WCML Hooks Reference. Additionally, if you're experiencing issues or need further clarification, please provide the debug information of your site. You can find the steps to do this here: Provide Debug Information.
If this solution does not apply to your case, or if it seems outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. Should you need further assistance, please do not hesitate to open a new support ticket or visit our support forum at WPML Support Forum.