he action parameter is usually generated dynamically, so you might find it by interacting with the page (e.g., scrolling or clicking). Then, use the browser’s dev tools (Network tab) to track requests that include the action parameter.

Here’s a simple way to grab it with JavaScript in the console:

console.log(grecaptcha.getResponse());

If you're still stuck, tools like CapSolver can bypass reCAPTCHA v3 and their blog might can help, including the action parameter, and make it easier to bypass. You can check it out if needed.