Recovering data from a drive that has been formatted is always more challenging. IF the drive had encryption (Bitlocker or FileVault), recovery of deleted files would be impossible. Since the decryption key got wiped out as well, it wouldn’t be possible to recover the data.
Mac Formatted Drive Recovery: If you Mac drive was fully formatted, as long as there was no encryption, we should be able to recover the data, but it would be WITHOUT a file or folder structure. The recovered data would be in format.
PC Formatted Drive Recovery: If you PC formatted drive was fully formatted, we may still be able to recover the data with a full file structure. Just please make sure to power down the drive to prevent overwriting of data.