At this time the only way to get the date of project creation is through the database, please display this value for all projects.

Workaround

• Using Automation for Jira and Project properties, creation date can be added to projects as a property key: Automatically set project creation date with project properties
• You can create a cloud backup of the Jira site using the steps here - Export data from Jira Cloud. The entities.xml file will contain a list of all projects, including metadata that includes the creation date.