Add the rice, chicken stock, chicken thighs, ginger, and garlic into the Instant Pot.
Close the lid and set to pressure cook on high for 25 minutes.
Allow natural release for 10 minutes, then quick release the rest of the pressure.
Remove chicken thighs, shred them with a fork, and stir the meat back into the congee.
Taste and season with salt. Adjust consistency with extra stock if too thick.
Ladle into bowls and top with scallions, a drizzle of soy sauce, and sesame oil.