Combine the broth, pasta, tuna, peas, bacon bits, garlic, salt, and pepper in the pot insert and stir.
Close the lid, set manual pressure for 4 minutes.
Once done, quick release.
When the pin drops, remove the lid and stir in the cheese, evaporated milk, and cornstarch.
Place the lid back on and let it sit for several minutes to let the mixture thicken.
Sprinkle with additional bacon bits and cheese when serving if desired.