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Hi there!
You got boosters on the old device and they stay there, you have to use them there. If you have a new device, it will not be transferred regardless of whether it is the same account. Because it is available differently for all devices. If you have boosters on the new phone, you will see that they are missing on the old phone. It's that simple. Where the boosters are, they must also be used. Unfortunately that's how it is!! Sorry
In the case of Android your collected booster is stored in Phone memory. This stored booster can not be synced with the server, because the game studio still does not have this process.You will not be able to transfer the boosters to another device, you will lose the complete booster for app uninstalling or crashing. And the boosters are not refundable.
However, Gold bars and your game progress will be returned, as it has been possible to sync.
Also please check HERE.