For food forests, you do what you can to use edible plant life to mimic the ecosystems of a wild forest.
“A food forest, also called a forest garden, is a diverse planting of edible plants that attempts to mimic the ecosystems and patterns found in nature.” | Project Food Forest
If done right, this system will…
Promote a healthy soil microbiome
Increase carbon-capture (no-till)
Prevent erosion
Retain water
And more.
Personally, I suggest using as many perennials to your area as you can so you don't have to replant everything every year.
Here are some perennial examples that are for my specific area:
(⚠ means you may want to container garden them to prevent spread)
Some do! The food forest method is very popular with fans of permaculture, and companion planting (like The Three Sisters) is sometime brought up in the community.