Update State From Props

Initial value for state is only used for the first render of the component, all later renders ignore the initial state value and take the current value from the state to render the component. Thus, to re-initialize the state again from the changing props, for example, from the parent component, one should use an effect like in the following example:

export function InputDataForm({
    inputData,
}: Readonly<IInputDataFormProps>): React.JSX.Element {

    const [inputDataCopy, setInputDataCopy] = useState<InputData>(inputData);

    useEffect(() => {
        setInputDataCopy(inputData);
    }, [inputData]);

    //...
}

From React, useState:

initialState: The value you want to initialize the state with. It can be a value of any type, but there > is a special behavior for functions. This argument is ignored after the initial render.