Creating a Checkbox that Auto-Checks

Hello! I hope this finds you all well. I am looking for some information on whether or not a Checkbox can be Auto-Checked. Simply put, I have a client that has a form with a Required Signature field. Next to the Signature field they want a Checkbox titled "Electronically Signed". Their hope is that when the Signature field is signed it will cause the Checkbox to Auto Populate (Auto Check). Is this possible? Any information that can be provided is GREATLY appreciated!! Thank you so much!!