Heat butter in a medium saucepan. Whisk in flour until smooth. Slowly stir in broth, whisking constantly. Stir in seasonings until smooth.
Burritos
Add beef, 1 cup water, 1 cup sauce to the Instant Pot. Lock lid; set valve to sealing. Program for bean/chili. After cook time ends, allow natural pressure release for at least 10 minutes. Carefully move valve to venting and allow remaining pressure to dissipate. Open lid and shred beef.
Preheat broiler.
Fill each tortilla with shredded beef mixture. Fold in sides, roll up and place seam side down in a greased baking dish. Top with remaining sauce and grated cheese. Broil 2-3 minutes or until hot and bubbly. (Note: watch closely at the broiling stage as it can burn easily.)