Recaptcha v3 is backend implementation necessery?

I am building a site using django and I have a form where I want to use reCAPTCHA v3.

Google's documentation states that there are two options. Either automatically bind the challenge to a button or to programmatically invoke the challenge.

My question is whether I need to implement any backend changes while using the first option (automatic binding), cause by reading the documentation I can't figure it out.

Thanks for your time!