First, lower the meat-cooking time. If the meat dish cooks in 8 hours on low or 4 hours on high in the slow cooker, it will cook in 25-30 minutes in the Instant Pot. Make sure the Instant Pot setting reads "sealing" and not "venting" to ensure it's cooked properly. If you're cooking meat from frozen in an Instant Pot, just add 5 or 10 more minutes to the total cook time until it's done. Don't forget that Instant Pots need more liquid to function properly, so if your recipe doesn't already call for at least a cup of liquid (such as broth or water), add it.