Spray the Instant Pot with cooking spray. Set to saute setting and heat up.
Once heated, add minced garlic and diced onion and saute for about a minute or two.
Add ground beef and season with the seasonings. Break up the ground beef as it cooks. Cook for about 5 minutes, while continuing to break up, until about halfway cooked.
Turn off the Instant Pot.
Add pasta noodles, dry on top of the beef.
Add in Worcestershire, ketchup, Splenda, tomatoes, broth and corn kernels. Stir to combine, trying not to disturb the pasta.
Cover the pot and secure the lid. Make sure the valve is set to sealing. Set the pressure cook button to 4 minutes and start it.
Once the timer goes off, vent and de-pressurize the instapot then open the lid.
Add in cream cheese and shredded cheese, stirring to combine.