Flutter developer to install APP on Apple store

I have a fully developed app and installed on my google app store, but It still give error on Apple store, The work need to be done through teamviewer.
link to google apps
https://play.google.com/store/apps/details?id=com.qutech.greenamazonuser
https://play.google.com/store/apps/details?id=com.qutech.greenamazonstore