Kitchen Island appliances

Any cooktop can go on an island. The issue is the venting. Only a few brands make them with the downdraft vent built-in as it is not a mass-produced appliance, so venting is usually the issue. You can also put an island vent above, but that can be costly and obtrusive on the view. Most brands design them for the wall application as that is pretty common in most kitchen setups, so they sell the most.

Here is one from Jenn Air model # JED4536KB