Hi,
As supposed to this article:
https://learn.microsoft.com/en-us/answers/questions/336797/recover-data-in-azure-data-explorer.html
"It should be possible when you have the table's effective retention policy has 'Recoverability' set to 'Enabled', and less than 14 days have passed – it should be possible.
To do so, you will have to work with the Microsoft support team .."