Currently, it's not possible to see all of the campaigns that have used a certain email template. To inquire if this ability can be added to the platform, please reach out to your CSM to submit Product Feedback on your behalf.
Product Feedback will inquire with the development team if this feature can be added to the ongoing development roadmap.
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)