Welcome to the new Forge module - jira:entityProperty category!
The Jira entity property module is available as an Early Access Program (EAP). You are more than welcome to share your feedback, report bugs or ask questions.
Documentation is already available:
https://developer.atlassian.com/platform/forge/manifest-reference/modules/jira-entity-property/
Be aware that future changes in the module may break your apps. We will communicate about all planned changes in this category.