webMethods Broker does not support Jakarta Messaging 3.0. So, you won’t find jakarta.jms.* implementation in Broker 10.5 or 10.15. As of today, it is not planned in next release (Broker 11, most likely) either.
You can approach Software AG and ask for future roadmap, or other solution for the problem.
Edit: Scofeild’s suggestion of compatibility bridge or adapter is an option that can be explored.
#webMethods#broker