You can get TTM for Jira for Jira Cloud. There are 2 options to install an app in Jira.
Note: you must be an admin or have sufficient permissions to install an app in Jira.
1. Searching TTM for Jira in Jira marketplace
You can install TTM directly in the Atlassian marketplace using this link.
Alternatively you can search "Tricentis Test Management for Jira" in the search bar.
Simply navigate to the page and click "Try it for free"
2. Getting TTM inside Jira
Navigate to Apps -> Explore more apps -> Search "Tricentis Test Management for Jira".
Click Try it for free
To get started with Tricentis Test Management For Jira choose your environment: