GoTenna app using tons of storage on iPhone

I recently moved from a 13 Pro to a 15 Pro. Still in the process of getting everything tamed. But in doing something unrelated, was looking at storage used. GoTenna is using 67.69 GB…for what? I’ve hardly used the app in the last year. I just deleted the downloaded maps and saved pins, and this number didn’t budge. This is 25% of the total storage on the phone.

I’ve looked through the app settings, and see no way to clean this pile of whatever up. I think I may be driven to deleting the app and reinstalling…it still seems to be on the app store. And then trying to get things working again with zero support from the company.

Any suggestions before I go down that road?