Turn your instant pot to the saute function and allow it to heat up until it reads "Hot."
Add in the ground beef and diced onions and cook until the meat begins to brown and the onions start to soften, breaking up the meat as it browns. This is about 5 minutes.
Add in the minced garlic and saute for 1-2 minutes longer, or until the meat is fully browned. Turn Instant Pot OFF.
Drain off any excess grease and return inner pot to Instant Pot.
Add in beer and stock and scrape up the browned bits off the inner pot. This step is REALLY important--if you leave too many browned bits on the inner pot, your pressure cooker may not come to pressure correctly.
Add in the chili seasoning, beans, and crushed tomatoes, and stir well. Place lid on instant pot with valve closed to "sealing."
Cook on high pressure for 15 minutes.
Let pressure release naturally--about 15-20 minutes. Remove lid and stir in Worcestershire sauce and serve chili up with desired toppings.