How do you determine whether React components are controlled or not?

I understand the difference between the two below.

• Control Components: Form data is handled by React components (manage by components such as useState).
• Uncontrolled components: DOM handles form data itself (using ref to obtain its value)

"If you look at the official document, you may have already read it, but I will attach a reference link

• https://ja.reactjs.org/docs/uncontrolled-components.html
• https://goshacmd.com/controlled-vs-uncontrolled-inputs-react/