Refrigerator on a shared electric line with Stove and 5 countertop outlets
The refrigerator outlet being shared with countertop outlets is fine, and very common in older houses.  However, there are some advantages to having the refrigerator be on a dedicated circuit.  The primary advantage is that you're at no risk of some other device tripping the breaker, and you don't turn it back on right away for whatever reason, not realizing that your food is spoiling.  The other advantage is that if you ever install a backup power source, such as a generator, it's much easier to wire that to keep your food save through power outages.  It's up to you whether this is worth breaking out the drywall for or not.