My company migrated from Jira Tempo to Project Advantage (formerly Sciforma) by Planview for timesheet management. https://www.planview.com/products-solutions/products/planview-projectadvantage/

I would appreciate a plugin offering functionality similar to the Jira one: retrieving project and assignment tags, along with the ability to export timesheets to Project Advantage.

Planview does provide a REST API, but the documentation appears to be accessible only to partners : https://success.sciforma.com/en/user/login