You'll have to set up custom domains that you want to use on the DXP for each environments slots and work with Optimizely support to configure them for the instance. Then when you deploy just got ot the relevant domains you've set up. Out of the box you only get one standard domain per slot/environment as multisite is a choice of the platform usage.
Epinova have written a blog post about this: https://www.epinova.no/folg-med/blogg/2021/preview-dxp-slot-domain/
Short summary: add ?x-ms-routing-name=slot on the domain(s) you want to test. Then you will go against the slot instead
To go back, use ?x-ms-routing-name=self
When we are pusing any code from Integration to Preprod or Preprod to Prod environement. In first step we click on the publish button and in second step we need to validate our changes before completing the publish. At this stage below screen appears
But, by default we are getting only one link, whick will redirect to the primary website only. I want to validate the all websites running on current instance before completing my deployment. Please suggest any way to get this done.
Many thanks in adavance..!!