Understanding expected behaviour of RadioButtons - how to group them

Hi there

I'm wondering how to make several/seperate  groupings of radiobuttons?

ChatGPT suggested the key to grouping them was controlling the IsChecked property of all the controls in your ‘group’ by handling through the Click event.

What I'm finding though is every radiobutton on the page  is behaving as if its all one group.

The docs don't seem to say what should happen.  So I think my question is how to I create  more than 1 group of radiobuttons, so the groups don't affect each other?