5G can support data roaming. However, the ability to use it abroad depends on several factors.
Firstly, you'll need a 5G-ready phone. Once you have the appropriate technology, verifying whether your mobile network provider supports 5G and 5G roaming and offers coverage in your intended travel location is crucial.
Since 5G is still relatively new, it will take time for this high-speed mobile network to be deployed worldwide fully. Once broader 5G coverage is established, 5G data roaming will become as accessible as roaming on 4G.