How to get the desired response from reCAPTCHA v3 in react?

Question

reCAPTCHA

Google's instructions say to get a response like
{
"success": true|false, // whether this request was a valid reCAPTCHA token for your site
"score": number // the score for this request (0.0 - 1.0)
" action": string // the action name for this request (important to verify)
"challenge_ts": timestamp, // timestamp of the challenge load (ISO format yyyy-MM-dd'T'HH:mm:ssZZ)
"hostname" : string, // the hostname of the site where the reCAPTCHA was solved
"error-codes": [...] // optional
}
but in the instructions for react it's all about getting a token.
Whether it is necessary to connect the backend is not clear.