Some game engines have stores where you can display and sell assets for other game devs. Does Godot have such a store? Or is it planning to create one?
Does Godot have an asset store?
There aren't stores to sell anything but you can release stuff for free.
Not yet, but with W4 being a thing now, it might happen. Though the most immediate option for authors of game art at least, will likely be the epic asset store they announced that will be engine agnostic.
Meanwhile for godot specific scripts and plugins using itch.io or gumtree or such might be a valid option.