Это ответ
<MapView>
<Polygon
coordinates={[
{ latitude: 37.8025259, longitude: -122.4351431 },
{ latitude: 37.7896386, longitude: -122.421646 },
{ latitude: 37.7665248, longitude: -122.4161628 },
{ latitude: 37.7734153, longitude: -122.4577787 },
{ latitude: 37.7948605, longitude: -122.4596065 },
{ latitude: 37.8025259, longitude: -122.4351431 }
]}
strokeColor="#000" // fallback for when `strokeColors` is not supported by the map-provider
strokeColors={[
'#7F0000',
'#00000000', // no color, creates a "long" gradient between the previous and next coordinate
'#B24112',
'#E5845C',
'#238C23',
'#7F0000'
]}
strokeWidth={6}
/>
</MapView>