IVS player quality of streaming 1080 is poor

streaming with amazon-ivs-broadcast-ios-sample and using "amazon-ivs-react-native-player": "^1.0.0" streaming quality

AVC profile	Main
AVC level	4.2
Resolution	1080 x 1920
Target bitrate	8,500 kbps
Target framerate	60
Video codec	avc1.4D002A
Audio codec	mp4a.40.2
Target audio bitrate	160 kbps
Audio sample rate	48 kHz
Number of audio channels	 2

Output in player is not more than 2500KBPS so there is no use to use such a high quality even though I have good internet connection 71.2 Mbps download 27.5 MBps upload i got in ivs player

onVideoStatistics={(qvd) => {
        if (qvd?.duration) {
          // console.log(`onVideoStatistics ${JSON.stringify(qvd?.bitrate)}`)
          props.onSetBit(`${parseInt(parseInt(qvd?.bitrate) / 1000)} kbps`)
          // console.log(qvd)
        }
      }}

Please let me know is there a way to improve quality tried with these option also but nothing worked

     // autoMaxQuality={{
      //   bitrate: 8500000,
      //   codecs: 'avc1.4D002A,mp4a.40.2',
      //   framerate: 60,
      //   height: 1920,
      //   name: '1920p60',
      //   width: 1080,
      // }}
      // autoQualityMode={false}
      // quality={{
      //   bitrate: 8500000,
      //   codecs: 'avc1.4D002A,mp4a.40.2',
      //   framerate: 60,
      //   height: 1920,
      //   name: '1920p60',
      //   width: 1080,
      // }}