UEFI standard requires support for FAT and then can implement other file systems for the EFI System Partition.
But no vendor actually implements any with the exception of those forced to include APFS by Apple. So FAT is the de facto standard for all ESPs for years.
UEFI standard requires support for FAT and then can implement other file systems for the EFI System Partition.
But no vendor actually implements any with the exception of those forced to include APFS by Apple. So FAT is the de facto standard for all ESPs for years.