Although this is not a bug as such, it is still nessessarry. I would love for there to be a share worlds button on minecraft pe, simmilar to the export world option on minecraft for windows 10, but you can share a worlds via email or skype, this is also great brcause it would sllow you to expot your own worlds aswell. Athough it is possible acsess the world folder through a file explorer, sometimes worlds are saver internally and cannot be accessed. Also they are saved as folders, and you have to compress  them to convert to .mcworld, all in all, I think it would be a very easy feature to add, and a very usefull one too.

Could put button here: