Delete, is mine deleted?

Not asking how to do it. Want to know if it had been done.
2017 mx13 epa13
My truck used to get 8 to 10 mpg now gets 2 to 4 mpg. This started up months back when my software got updated.
1. I was told by a guy who does deleted that on these engines they do not have to hollow out the dpf and screen filters. Is this true?
2. A mechanic pointed at my EGR and asked me if my truck had been deleted.
3. My engine has a blow by tube on it.
4. The engine does regen properly.

So, is it possible to delete this without hollowing out dpf. Thus when update software occurred the regen system went back online but EGR is still blocked off?
Or is this not possible.
Thanks.

 

I did not have anything done to it.
It ran great when I bought it but went downhill.
When I noticed the blow by tube it got me thinking about the other stuff.
I did not think a delete could be done on this without hollowing the dpf out. I been running deleted Cummins and Detroit in trucks for years.
But I just thought I would ask just in case.
Now I'm back to trying to figure out this mpg problem. No one has come up with any answer. New hi pressure fuel pump, fuel pressure sensor did nothing.
If I pull off the EGR to take a look, will I have to get it recalibrate or anything?
Just thought I would check to see if anyone had blocked it off.

All this fuel problem started shortly after I bought it when I took it to peterbilt and they upgraded my software program.

 

Yep. Pete around here is useless. But I think I know someone that has Davie 4 software.
I also know s guy here that does deleted on these epa13.
I might have him take a look around. Probably knows a thing or two about paccar.
I been in 3 shops that did nothing but hook up laptop and charge me up to 300 bucks for telling me they don't know what is wrong.