World Export on Mobile (iOS)
In Minecraft Bedrock on Windows 10, there is a world export button. This feature is also available on other platforms, albeit in a hidden form. The mod titled World Export on Mobile (iOS) (Export World on Phone) reveals the button in the mobile version of the game, enabling players to export their worlds to any version. 
In the world settings of Minecraft: Pocket Edition, an export world button will appear, along with an additional export template button.
Compatible with iOS. There may be installation issues on Android.
Installing World Export on Mobile (iOS) (.mcpack)
- Download the mod labeled as “.mcpack” below.
- Open the downloaded file to import the add-on/texture into Minecraft.
- Launch Minecraft Pocket Edition and navigate to the world settings.
- For the world, enable the imported:
— Add-on Packs. - Select the imported resource packs/add-ons in each section.
- It is advisable to restart the Minecraft PE game client afterward.
- Start Minecraft Pocket Edition, enter the previously configured world Minecraft, and enjoy the add-on!