FreeFileSync Forum

No, you can use software to get NTFS on Mac, you can use software for HFS+/APFS on Windows, you can use SMB shares, you can set up an FTP server, or use exFAT. There are probably more options also.
What you probably meant is "Is exFAT the only file system that is natively support on both Windows ...

is exFAT the only option to sync between MAC and WIN?