Step 1

Turn on a multi-functional pressure cooker (such as Instant Pot®) and select Saute function. Add bacon; cook until crispy, 8 to 10 minutes. Pull bacon out with tongs and set in a bowl. Add kielbasa to the pot; lightly brown on all sides, 5 to 7 minutes. Remove with tongs and place in the bowl with the bacon.

Step 2

Saute onions in the pot until soft, 2 to 3 minutes. Crumble the bacon and add to the pot. Stir in brown sugar. Add potatoes, sauerkraut, chicken broth, apple, beer, and salt. Mix gently.

Step 3

Close and lock the lid. Select high pressure according to manufacturer's instructions; set timer for 12 minutes. Allow 10 to 15 minutes for pressure to build.

Step 4

Release pressure using the natural-release method for 10 minutes according to manufacturer's instructions. Release remaining pressure carefully using the quick-release method. Unlock and remove the lid.