The Frigade Forms SDK has introduced support for asynchronous validation between steps or pages in a form through the validationHandler prop on the <FrigadeForm /> component, allowing developers to prevent users from proceeding to the next step until an asynchronous call, such as a database or API call, is successfully completed. This feature addresses developer feedback by enabling the blocking of user progression until these asynchronous processes finish, ensuring that necessary validations occur before continuing. The implementation is demonstrated in an onboarding flow example where the validationHandler is used to send data to a database and confirm the success of the call, indicated by a loading symbol in the button. To utilize this feature, developers need to update to version 1.35.29 of @frigade/react.