I fed the turtle fish and chips and waited about 20 minutes. I left to run a dungeon and came back. I could offer the 2nd item, which I did and waited a few more minutes. It didn’t seem like I was going to be able to offer the 3rd necessary item any time soon, so I decided to log off and try the next day (today) to finish up. When I got to the location of the NPC, there was nothing there. I could see other people attempting to interact with something in the area but nothing was visible to me. Turtle’s Thanks is still incomplete on the achievement list. I have the last of the items needed for the turtle in my bags.
fish and chips isn’t required any more. I fed the turtle the multiple fish, flew away, came back and fed it a single fish. it then moves to Dornagal, and you talk to it and then you get the item.
I am an idiot. The info I was using was incomplete. After sifting through more information, the NPC moves and I just needed to go there to find them.