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I am sorry to say that, There is no option to recover deleted submission data in the submission data panel.
But I think you use the Revision History tool and revert your form to a previous saved point. It will restore the previous submission data as well.
User guide: How-to-view-form-revision-history
Another way to regain the submission data is via the submission email.
You can review the submission sent email of your form in your sent email history logs.
User guide: How-to-View-All-Your-Form-Email-History
Let us know if you need further assistance.