Please note

If your Jira Cloud UI layout looks like the following screenshot, then it means you're using the "old" Jira UI. You need to switch on the new layout, which you can do in your profile on the top right-hand corner.

EAP Installation

Manual Installation

If you are entitled to the EAP, please perform the following steps in order to manually install Xray in your cloud instance:

Make sure you have a project. If you're creating a new Jira Cloud instance, you may do it during that process.
Go into the Administration section of Jira by choosing Settings -> Add-ons -> Manage Add-ons.
Click on Settings and Enable private listings.
Select Upload Add-on and enter the URL provided to you by the Xray team.
Click Upload. Once the Xray app is installed, the token must be configured automatically when you expand the Xray add-on.
Enjoy