DOC Catalyst Efficiency Numbers

[MPDiagnostics]

Got a 2014 ISX CM2350, 700,000ish miles.
- DPF replaced recently!
- Don't know when EGR tuneup was last done but at the given moment the truck is constantly asking for regens. No exhaust leaks, but haven't thoroughly checked CAC system for leaks. I was looking around Insite to see what I could find and wondered about the DOC efficiency numbers. On other trucks I often find 0.95 across the board, but on a few I'm starting to see similar to this

   

So I'm wondering if these number are getting high. Can't seem to find specs for this either on quick serve or in service manual.

I feel like the DOC is getting plugged but not quite sure. If it is, can this be sent to a shop and get cleaned out??

Help me out if you can cuz I haven't ventured here yet.