@vanshgg -
Please have look into blogs, might help you understanding-
https://levelup.gitconnected.com/aem-how-to-use-nested-multifields-in-your-components-using-a-sling-model-vs-pure-htl-92ff8d036ba1
https://aemhints.com/2020/10/24/coral-nested-multifield-aem65
Thanks