Tree View: Layer Country

I want to display a country list with regions. To do so I create a tree view field that references the country tag box:

[
	{
		"fieldId": "country",
		"allowRecursion": false,
		"levels": [
			{
				"fieldId": "regions",
				"allowRecursion": true,
				"levels": []
			}
		]
	}
]

Then add a channel filter

And you have:

And you can see if you open the tree the different regions and countries: