After solving all the puzzles, Bayek received one more papyrus.
To you, the ardent adventurer.
You have found all my treasures through all the dirt, mud, hardships, beauty and soul of this world. You set your intentions and the universe helped you reach them.
What will you carry as you walk away from this experience? Is it the treasure, or something more?
Bayek solved all the puzzles, and was left with one more.