How to replace a template of the blog post page in avada theme in wordpress with a new one?

I require to replace the blog post page in avada theme with a newly build page or customize the existing theme. Any idea about how that can be done ? Actual site url : https://www.wishtv.com/sports/college-basketball/kansas-becomes-latest-no-1-in-ap-top-25-tar-heels-fall-out/ Ongoing site’s url : https://dev-wishtv.pantheonsite.io/news/hoosiers-rout-leathernecks-98-65-in-opening-night-hit/

Details