If you use truck poi and put also standard poi, you will have and see both. It's not a problem to see on the map where your preferred stops and markets match.
The problem is that they can overlap, so that you overlook them.
Therefore, planning is used before every trip.

I consider this thread to be a coherent one. It's just insufficient knowledge of matter and basic functions of igo.

One more thing - main function of iGO is navigation and all the elements that go with it. Only that.
Yes, some addons would make your work much easier, but ... for the doings of things, software is made which are very specialized and cost much more.