Final amends and fixes for React Native iOS app

We have built and tested the first version of our iOS app using react-native. It is basically a radio player, with a play button, that plays our stream. You can also pause the stream again.

We want the following changes and fixes so it can go live:

1. When the app is closed the music stops. I have tried implementing "expo-keep-awake" from npm to try and fix this but no luck. It needs debugging and fixing so that the audio constantly plays, even with the app hidden/running in the background.
2. Swap the header text for our logo.
3. Animate the play button when the stream is loading and playing (there are events which fire as the stream is correctly loaded).
3. Swap the background colour for a new graphic that we will supply.
4. Pull in the now playing data from our JSON API. This is simply the artist and track name. We already have this here: https://player.electricradio.co.uk/ so you should just be able to copy the code we have or adapt for react-native.
5. Add a button on the page that opens our main site in the native device browser. I can provide a rough design to guide on where all the elements should sit on the page.

So to confirm, we've already built the app in react native (and it's working in Test flight). We just need the above amends and fixes.

Please provide a fixed price estimate for this work. Location can be worldwide, but please demonstrate that you've worked with react-native before and the apps you've produced.

Please don't send briefs that summarise all the types of services you offer. Only specific to these requirements.

Turnaround -5-7 days max.

Thanks