On Minecraft Bedrock on Windows 10, there is an export world button. That button still exists on other platforms, but it is hidden. This resource pack unhides that button on mobile.
In your world settings, there will be a button to export the world, and another to export as a template. These buttons generate a .mcworld file that you can share with your friends.
I have had reports that this doesn’t work on Android, but it works for me on iOS.
Added a notice that this resource pack doesn't work on Android.
Must be put in global resources. Only works on iOS