Azure Files does not have RA-GRS support currently. So your Azure Files data should still be replicated to a secondary region but it will not be read accessible.
"In the event of a major disaster such as the permanent loss of an Azure region due to a natural disaster or other similar event, Microsoft will perform a failover and the secondary becomes the primary, serving all operations. Since the replication between the primary and secondary regions are asynchronous, in the event of a major disaster, data not yet replicated to the secondary region will be lost. You can also perform a manual failover of a geo-redundant storage account."
https://learn.microsoft.com/en-us/azure/storage/files/storage-files-planning#redundancy