Hello @Raina Kwon,
Welcome to Atlassian Community!
The Issue Key is a unique identifier for issues. With this said, it's not possible to hide this type of information on the Roadmap.
The only place where it's possible to hide the issue key is on the Filters > Advanced search. Other features don’t allow to remove or hide it.
Currently, there are no feature requests suggesting this, so please, feel free to raise one on jira.atlassian.com (project JSWCLOUD) adding more details about why hiding an issue key on the Roadmap is important for your environment.
Regards,
Angélica
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