How do you decide which plants to list? Is it just the inventory from a few niche sellers? Seems to be missing a lot of really common plants. I couldn't find ap

How do you decide which plants to list? Is it just the inventory from a few niche sellers? Seems to be missing a lot of really common plants. I couldn't find apple or pear trees for instance. Honestly just checking it out briefly, it didn't seem super useful. Why is there no way to sort by your plant hardiness zone?