@NotWegant you can find a module where there is this button. Open his folder, find an action there in which there is this button and open a document with an interface note through notepad. And see how it is implemented
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"
Also tried with the action "Get Fingerprint" - Checked "Perfect Canvas" and left the field for the PC request key empty. But in this case it doesn't seem to fetch an Perfect Canvas fingerprint at all.
Makes it sense to enter an PC request key from another site to get an PC FP?