Progress Transfer

I was wondering, i already contacted the devs a few years ago and read a few posts here regarding the possibility of transferring the game progress from android to iOS and vice versa.
I know that google play and apple Game Center use different servers, but there was an option of doing it via Facebook or this WOA account. Is there any progress on this topic?
Ever since i changed to an apple I did not continue playing since I have to start from the beginning again.
Any update would be great!