Recaptcha v3 only works with v2?

Question

reCAPTCHA

https://developers.google.com/recaptcha/docs/v3
And where is the actual challenge for the user? After all, v3 does not cause verification for users at all

enables you to take an appropriate action for your site.

It's great, but as I already understood, it is impossible to call a manual challenge for this version, as well as for other versions of the captcha.

eCAPTCHA v3 will never interrupt your users, so you can run it whenever you like without affecting conversion.

Well, what's the point then v3 recaptcha, this is no longer a recaptcha, but the usual "behavior track" or "actions track" that tracks the user's actions giving out the degree of suspicion.
Did I understand correctly that now we also need to additionally connect recaptcha v2 because v3 is exclusively for the server part?
Here's what to do, the answer was received that the threat level is max, to block the entire UI?
But how to check whether this is really a person, because there is a possibility that a real person will be assigned the maximum threat level.

Answer 1

FAQ
Yes, V3 only gives the level of suspicion. To call the challenge, you need to integrate v2 along with v3 on the same page.
All this, of course, is an additional burden, requests. Therefore, I do it in the background asynchronously. At what level of threat to issue a captcha we decide on the server. What is the complexity of the captcha in the google captcha settings, usually the most difficult. The user has already failed the first captcha test v3.
In this way, we make life easier for customers, invisible captcha works in the background and requires verification only in specific places at different threat levels.
IMPORTANT - here THIS answer from github is very outdated