Native woodlands have a higher density of trees than most home yards, and the piles of leaves that accumulate in that habitat is not a hindrance for the tree roots underneath. The leaves are an insulating layer, helping to moderate both soil temperature swings as well as slowing evaporation of soil moisture in the drier winter air. They biodegrade into organic matter that serves as a natural fertilizer (aside from the other benefits it provides), and by spring, the depth of fallen leaves has decreased substantially as they are being broken down by soil life (insects, worms, microbes, etc.).

Fallen leaves are a fine mulch for vegetable and flower beds as well. While it's best for a lawn to have the leaves moved elsewhere (or shredded by a lawn mower and left in place, which is good for the lawn but not helpful for any beneficial insects or other wildlife using those leaves for winter shelter) so the grass gets enough airflow and light, leaves otherwise don't have to be moved off of most plantings. If blowing or raking them into woods on the property is the only other option, that should be fine to do without risking tree health.

Miri

It should be fine, yes, but if you're concerned, you could see if any neighbors want leaves for either their own compost piles or leaf-mulch spreading. Tree roots spread well beyond the drip line (canopy edges), so they should have access to enough moisture (drought notwithstanding). Once it does rain or snow enough to re-wet the ground, the leaf mulch will help to retain that moisture for longer than if the leaf layer were absent.

Miri

You're welcome.