Sandbox cannot use EL function fn:startsWith

Summary: Using the EL expression

#{fn:startsWith(bindings.DeliverToLocation.inputValue, 'XX')}

in Sandbox Page customization Oracle ERP cloud is returning error Error: Error in Expression javax.faces.validator.ValidatorException: Function 'fn:startsWith' not found

We need to validate first two characters of bindings.DeliverToLocation.inputValue. Can someone help me?

Version (include the version you are using, if applicable): Oracle Fusion Cloud Applications24D (11.13.24.10.0)

Code Snippet (add any code snippets that support your topic, if applicable): #{fn:startsWith(bindings.DeliverToLocation.inputValue, 'XX')}