They may have lots but they don’t have enough, certainly not surplus.
There is a tree deficit in the USA and they are still cutting them down at stupid rates.
Yuwipi Woman has told us about her neighbours chopping down trees for fear of flu-ridden birds roosting in them. They’re still cutting down some of their old growth forests. Where they do plant trees, they create monocultures. Urban areas don’t have enough trees. Trees planted in rich areas aren’t part of surrounding healthy diversity and often get isolated by manicured gardens. In the Deep South the old growth was removed for plantations and in some areas its rare to find any tree older than about 200 years, with subsequent disastrous soil erosion and even more problematic efforts to fix the soil.
And so on. Plenty of fine detail to be argued over, and they do have more trees now than they did 100 years ago. But on the whole, America has a tree deficit.