Directory question

I migrated new my site with no issues. It is working at https://mycompany.net.previewmysite.com/

How do I get it to work at https://mycompany.net – to replace the old site at the root?

I thought I could maybe just move the files manually but I don’t know the directory the new site is located in. I’m looking at the site directory and I’m not seeing a new folder with the new site. What would it be named??

https://www.ads-software.com/plugins/all-in-one-wp-migration/