Most modern airliners are equipped with capabilities to conduct Category IIIa ILS approaches with autoland.

One would probably be able to coach a passenger through the steps necessary to get set up this kind of approach.

Commercial airliners have autoland systems. Much less common in smaller planes.

Configuring these is very difficult (for a non-pilot) and it might rely on airport-side equipment that not all airports have.

Configuring an autopilot is not that difficult when someone is telling you exactly what to do. It's also more likely to have a good result vs. relying on underdeveloped stick and rudder skills.

In a situation where a non-pilot is pressed into flying an airliner because of pilot incapacitation, tiny municipal airstrips without ILS aren't really an option, anyway.

The supposed scenario is manual landing, don't know if that was mentioned in the op