This is great news so happy and yes .8 for creatinine is normal as anything below .9 is good -- i am thinking bun was 40 not 400 but 40 is still high.
you need to have vet give you copies of all blood work and keep a file at home as i keep all tests and bloodwork in a file for each of my dogs so if i have to go to another vet they can see everything.
The test you need to ask if they did is cpli and tli and when they pull blood you need to pay for that add on definitely if they think it was pancreatitis.
It is a low fat diet not low protein diet. She is still a puppy so she needs protein -- the diets that are low fat are dd diets, purina ha is 8% fat, iams low residue, eukaneuba and sounds like that diet you have is low fat too. This is why she was not eating as it sounds like she was feeling sick as diet was too high in fat or she may have inflammatory bowel disease which triggered the pancreatitis so make sure she does not have any diet with potato in it as white potato is inflammatory and many dogs vomit on potato. Demi and dex both vomit on potato but dee dee can eat it.
Do not over feed so if she is hungry feed 3 times a day as you need to let her pancreas and tummy rest and over feeding can trigger it again so be careful. No treats ever again and no people food period - you need to get a year behind you before doing anything so only her dog food - PERIOD - if dogs get this then they are likely to get it very easily again so you have to be very strict. if they get it over and over they can get diabetes or epi and you do not want to give your dog insulin shots daily. This disease is very serious and 50% die from it. Do not be weak to those pretty brown eyes and give her anything. This disease is also very expensive to treat.
Only ask for that other vet and i would complain about the one who did not do proper protocol as they obviously need more training as when a dog is vomitting you immediately do xray then blood work even a new vet should know this and the fact that this vet gave your dog a steroid shot made the thing 10xs worse as the steroid inflamed the pancreas further so this vet could have killed your dog and i have been worried ever since your last post

Also when pancreatitis you cannot have any meds, liquids, or food through the mouth for 48-72hrs and he sent you home with meds through mouth -- the reason you need to complain is this vet could hurt another dog sadly. New or not these are basics.
Please be very careful as my dex was home for one week and relapsed and it is not uncommon for them to relapse or get bacteria infections after having this so you are not completely out of the woods so be very careful. I would also recommend giving spring bottled water.