Hi, As you can see through this link google only supports the following schema types Movie, Course, Restaurant, and Recipe in itemList schema to display the carousel in rich results so please copy the below markup and past in rich results and change the type to any of the following schema types mentions above them you will see the carousel again if you change the type to the article then carousel is not be displayed such a current google only support the above four mention schema type in itemList schema to get the carousel.
<html>
<head>
<title>The Best Movies from the Oscars - 2018</title>
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "ItemList",
"itemListElement": [
{
"@type": "ListItem",
"position": "1",
"item": {
"@type": "Article",
"url": "https://example.com/2019-best-picture-noms#a-star-is-born",
"name": "A Star Is Born",
"image": "https://example.com/photos/6x9/photo.jpg",
"dateCreated": "2018-10-05"
}
},
{
"@type": "ListItem",
"position": "2",
"item": {
"@type": "Article",
"name": "Bohemian Rhapsody",
"url": "https://example.com/2019-best-picture-noms#bohemian-rhapsody",
"image": "https://example.com/photos/6x9/photo.jpg",
"dateCreated": "2018-11-02"
}
},
{
"@type": "ListItem",
"position": "3",
"item": {
"@type": "Article",
"name": "Black Panther",
"url": "https://example.com/2019-best-picture-noms#black-panther",
"image": "https://example.com/photos/6x9/photo.jpg",
"dateCreated": "2018-02-16"
}
}
]
}
</script>
</head>
<body>
</body>
</html>
https://developers.google.com/search/docs/appearance/structured-data/carousel