If you mean progress as in all your ocs, you can try getting every offline code and put it in a note pad to save them and put in the other gacha world app
I don't mean the progress of all the ocs i made since i dont have gacha club but instead gacha art. Also i didn't mean the gacha club app im talking about gacha world which is this 💀 (very late respond lol)
Simple solution. Just rename the app to something else, maybe "Original gacha world" or something. The system is probably recognizing it as the same app and therefore won't download it twice.