I have recovered files from drives that have lost their formatting, (and quick reformatted after they became RAW), using the Advanced Mode in Recuva.
We would need to know more about just what has happened. In particular is it unallocated or allocated but RAW?
In the situation that you describe I would fistly make an image backup of the whole disc in case something goes wrong or you mess up attempting recovery.
I'd then partition/quick format the unallocated space to give it a drive letter, using something like MiniTool Partition Wizard.
Once it has a drive letter I would then use Recuva's Advanced Mode to try and recover "undeleted files" from the newly quick formatted partition.
It's a process for 'advanced' computer users, but we all had to be beginers at some time.
It will take care and time, and it's not guaranteed to work, attempted recovery never is.
That's why careful people make regular backups of their files. It's much easier to restore a backup than try to recover files.
Edited by Nukecad, 26 December 2023 - 11:36 AM.