How can I see the form details while login to a website in Network Tab?

I understand that for login to any website via Python requests I need form details (username, password and other website specific details such as CSRF token from network tab of inspect element). However when I tried doing inspect element in most of the websites, I wasn't able to see that form details under Network tab. I checked it in Elements Tab as well, I got the username and password tags but not the other details. Due to the insufficient information my code isn't able to login. Can anyone please help me with that?