Pour the birria sauce over the seared meat in the pot.
Add the remaining beef broth, bay leaves, and cinnamon stick to the pot.
Stir to combine all ingredients.
Bring the mixture to a boil over medium-high heat.
Reduce the heat to low, cover the pot with a lid, and simmer for 2.5 to 3 hours.
Check occasionally, stirring to prevent sticking, until the meat is tender and easily shreds with a fork.