 By using Version History, you can actually recover your lost data which is in your previous version of your sheet. Here I'm going to delete a tab to show you demoed to recover the old deleted data used Version History. This will work even many days later from you deleted the data. Go to File and select Version History. In that select, see Version History to see the versions available by timing of the sheet. You can select which version do you want according to the timing of your lost data availability. Now you can see the deleted tab has been recovered in Version History. Select Restore this version. You can find lost data, but this will not have your new data after the timing of this version, so make sure you make a copy of the sheet to avoid lost of new data.