my site got rejected can anyone help me with suggestion what I am doing wrong

Envato Customers Web and Code
1

I upload this website on Themeforest

site link: https://car-carnival.netlify.app/
documentation: Car Carnival - Cleaning Services ReactJS Template

help me find the reason why my theme gets rejected and please make it detailed.

suggest to me the rules that I need to keep in mind for the next static HTML site same as this or singal page.

2

This is an old design style/approach ( I felt I was back in 2014s )