Currently, only PlayStation, Xbox, PC, Mac, and Android support the Fortnite Shared Wallet. This means your V-Bucks balance may change depending on what platform you’re on. Examples below:
PlayStation, Xbox, PC, and Android will display 0 V-Bucks available.
Nintendo Switch will display 1,000 V-Bucks available.
PlayStation, Xbox, PC, and Android will display 1,500 V-Bucks available.
Nintendo Switch will display 500 V-Bucks available.
The restrictions outlined above apply to purchased V-Bucks only. Any content purchased with your V-Bucks will be available across all platforms. For specific details please visit the Official Fortnite FAQ.