When you migrate your site to Kinsta and add a site, a temporary domain is created for you automatically (yoursite.kinsta.com).
After finishing the transfer, please make sure you add the final domain to your install before you update your DNS and point your site’s traffic to us.
To do this, please go to Sites/given install and select the Domains tab. If you’re using both www and non-www versions of your domain, be sure to add both!
After that you’ll only have to update your DNS and allow some time for the DNS to propagate, which typically is 24 hours.