2023 Child theme.json file custom font is not working

I have created a child theme of 2023 Default WordPress theme. Previously the custom font features works just fine. But on my new website I can’t add custom font from the child theme.

Is there anyone facing the same issue?

Here is the theme.json fonts code:

{
	"version": 2,
	"$schema": "https://schemas.wp.org/wp/6.3/theme.json",
	"settings": {
		"typography": {
			"fontFamilies": [
				{
					"fontFace": [
						{
							"fontFamily": "Montserrat",
							"fontStretch": "normal",
							"fontStyle": "normal",
							"fontWeight": "700",
							"src": [
								"file:./assets/fonts/montserrat-bold.woff2"
							]
						}
					],
					"fontFamily": "\"Montserrat\", sans-serif",
					"name": "Montserrat",
					"slug": "montserrat-bold"
				}
			]
		}
	}
}