As you know amazon app is one of the worst optimised app on Android. It causes so much heating and battery drain. Like some games consume less battery. It has no dark mode. It's literally so bad.
I use Amazon in vivaldi as web app.
1) First add amazon to homescreen, it will create a webapp. Then install dark reader extension(default dark mode in vivaldi darkens the product images) and whitelist amazon.
2) Ublock origin will remove the sponsored stuff if you want.
3) add keepa price tracker extension. You can easily see price history instead of utilising other 3rd party apps.
You can also zoom in whenever you like unlike the app.
And disable any other extension for this site as it will slow down the loading. It works so much faster and phone stays cool.
This can be done on any other app with extension support like firefox, edge or titanium.
In Android tab use a user agent changer extension to change user agent to android phone. Tab layout is hilariously bad as site doesn't match the viewframe of browser and you have to scroll left right everytime.
I have done the same for YouTube instead of breaking mods and repatching vanced or morphe.