802.1x user experience

Hi, I'm still new to networks and I'm struggling to understand what 802.1x looks like from the end user perspective.

So as I understand it, 802.1x will check the username and pw against a RADIUS server and grant or deny access. But where does the user put in those credentials?

I have never been asked for that when connecting to any network except for SSID password which I assume is not 802.1x but rather just a password.