To me it looks like encrypted/encoded data, with such random characters. It's not Hexidecimal (would just be A-F0-9).
I think the info sent to the phone might be encoded and displayed in the notification.
You might be better off extracting the info somehow off of what displays on the phone, and send the correct info in way that you can display yourself (perhaps with a Tasker scene).... I think..... but not sure.... that the notification has some kind of theming, it's like a system or DoorDash app "scene" showing the encrypted data a certain way.