Finally I ended using (it's also working for different languages of Recaptcha challenges) if someone searches for the same:
">CSS>iframe[src^=' https://www.google.com/recaptcha/api2/bframe ']>FRAME> >CSS>#recaptcha-verify-button"
Hi, i would recommend you to check CaptchaAI emulator it’s simulate 2Captcha services, and captures any captcha request and tunnels them to their service that is why i recommend you to use it. It is a better alternative because it does not charge you for only one captcha. It provides you with unlimited solves, and also you can ask them to provide you free trial for 7 days.
@stephenperry18 You need to attach to something else, which is not changing.
For example, if there is only one frame on page, or index of frame is not changing you can use following expression: