Version: v5.x (next)
Other layers

Live Editor
const center = [51.505, -0.09]
const rectangle = [
  [51.49, -0.08],
  [51.5, -0.06],
]

const fillBlueOptions = { fillColor: 'blue' }
const fillRedOptions = { fillColor: 'red' }
const greenOptions = { color: 'green', fillColor: 'green' }
const purpleOptions = { color: 'purple' }

render(
  <MapContainer center={center} zoom={13} scrollWheelZoom={false}>
    <TileLayer
      attribution='&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
      url="https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"
    />
    <LayerGroup>
      <Circle center={center} pathOptions={fillBlueOptions} radius={200} />
      <Circle
        center={center}
        pathOptions={fillRedOptions}
        radius={100}
        stroke={false}
      />
      <LayerGroup>
        <Circle
          center={[51.51, -0.08]}
          pathOptions={greenOptions}
          radius={100}
        />
      </LayerGroup>
    </LayerGroup>
    <FeatureGroup pathOptions={purpleOptions}>
      <Popup>Popup in FeatureGroup</Popup>
      <Circle center={[51.51, -0.06]} radius={200} />
      <Rectangle bounds={rectangle} />
    </FeatureGroup>
  </MapContainer>,
)
Result