Fixed an item of Stack mui in scrolling

Hi guys there is a problem that I want to set the position of an item fixed to when scrolling just center Item scroll and left item remains fixed how can I do this?

<Stack direction={`row`} spacing={10} divider={<Divider orientation={`vertical`} color={`black`} flexItem/>}>
                    <Item>leftside</Item>
                    <Item> center</Item>
</Stack>

I already try position css field and it didn’t work