Handling going to next step from a HTML block in Auth0 Forms

I’m using Auth0 Forms and have created a form step using only an HTML block (no pre-built templates or scripts). I need to handle advancing to the next step in the form flow from within the HTML block, but I can’t find any documented method or function that allows this.

Is there an officially supported way to trigger moving to the next step from within a custom HTML block?

Any help or workaround would be appreciated!