Glitter in the oil after the DOD delete?

[BUCKSATH]

I’m about 1000 miles post DODdelete on my wife’s 17 5.3 suburban. Everything went well and the Engine runs strong and seems completely fine. I flushed the engine out after the work was done and went 1000 miles and just changed the oil yesterday. I think I see very light glitter but I definitely see tiny flakes of metal like I saw before I did the DOD delete. Could it be possible that it still has metal floating around from before the work?