I have written an Android application in Kotlin language in Android Studio, which can run on mobile phones or tablets. Is there any quick and easy way to package it as an iOS application? Show screenshots of two Android applications running

I created a project using Kotlin Multiplayer Wizard in Android Studio, but some of the AndroidManifest.xml files are red and cannot be used. Can someone please tell me the reason? Thank you.

I use Kotlin Multiplayer Development to develop iOS applications. I access the methods in the Kotlin class of the shared module in the ContentView.swift file. Functions without parameters can be used normally, but functions with parameters cannot. For example, the 78th line of code on the left side of the screenshot works, but the 79th line does not. Can someone please tell me the reason? Thank you!

I want to use Swift language to write code for drawing multiple polygons. I would like to find some examples as references. Can anyone provide example code or tell me where I can see such examples? Thank you!

I have developed an application using Kotlin and Swift languages, which has been installed and run on an iPhone. It can also be installed on an iPad. Do I need to go through a testing process to publish it on the app store? Also, as a developer from China, are there convenient payment channels for developers?