We rarely see the roots of plants, not the whole length of them anyway, because they’re doing their job for the plant mainly under the ground.
Its primary functions are anchorage of the plant, absorption of water and dissolved minerals and conduction of these to the stem, and storage of reserve foods.
Britannica
Sometimes they emerge.
“If a tree falls in the forest there are other trees listening.”
Tim Flannery, The Hidden Life of Trees: What They Feel, How They Communicate – Discoveries from a Secret World