Kernel panic not syncing: vfs: unable to mount fs on unknown block(8,2 )

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Hello all,
after a power outage, the RPI4 where i installed NCP on external 1TB SSD , won’t boot anymore showing the error:

kernel panic not syncing: vfs: unable to mount fs on unknown block(8,2 )

i’ve tried fsck, e2fsck with different superblocks backup with no success.
Since i think there is no way to recover the filesystem, i’m wondering if instead there is a way to recover data stored on the disk!
My fault not to save automatic backups of ncp somewhere else.

Any help to recover my data would be very appreciate

thanks
Nick

Is this “Nextcloud” ?
I would check in this direction: