Looking for documentation on gluestack-ui with NativeWind (alpha) version? Refer to this link.

Platform Specific

We can provide platform specific styles in the sx prop of the component. The sx prop takes an object with _ios, _android and _web specific styles.
<Box justifyContent="center" alignItems="center" h="100%">
<Box alignItems="center">
<Button $ios-bg="$red500" $web-bg="$green500" $android-bg="$yellow500">
<ButtonText>Button</ButtonText>
</Button>
</Box>
</Box>
Expo snack link for above example is provided here.