Joomla 3 supports the newest Invisible reCAPTCHA (v3), see the core plugin: recaptcha_invisible

However, I see that the current captcha used by JLex Comment is still reCaptcha v2.

It is possible to implement the more smooth and fast Invisible Recaptcha to JLex Comment?

Also, maybe you don't even need to make a plugin and you can use the Joomla core plugin that already exists in Joomla? Not sure about this.

Thanks!
Andy