Check you have environment damage on in island settings.
Trees should be giving out wood resource automatically.
But I just looked through the Details tab of a tree…
There is a section called Interaction Speed
The first setting is Curve Table and select the Resource Rates Curve Table
then you can select the second setting Row Name it will give you a selection of resources, in this case there is ResourceWoodLow etc or PropWoodLow etc…
All my trees have settings here of None, None and I haven’t tested wood harvesting for a while, so maybe I need to test again and see if it still giving a default wood resource…
But now I need to find out what is the difference between ResourceWood & PropWood ???