can I use state value as a startOnLeft?

[Choyeongdeok]

const [switch, setSwitch] = useState(false)

useEffect(() => {
    ...
    getValueFromServer()
    ...
    
    setSwitch(true)
}, [])

return (
    <CustomSwitch
        startOnLeft={switch}
    />
)

I changed switch to true when I got a true from getValueFromServer(), but CustomSwitch doesn't start on right side.
Should I have to use constant to startOnLeft?