Is ThingWorx required for a Windchill–Codebeamer integration?

I would like to confirm whether there is an official supported way to integrate Windchill and Codebeamer without using ThingWorx.

We need to provide clear guidance to customers on whether ThingWorx is required for this functionality, or whether Windchill and Codebeamer can be connected through another official supported method.

The only PTC document I found mentioning this connection is:

https://www.ptc.com/en/support/article/CS400634?as=1

I also found this previous community post asking about Windchill–Codebeamer integration, but I could not find a clear answer there:

https://community.ptc.com/codebeamer-ideas-401/windchill-codebeamer-integration-152118

Any guidance or reference to official documentation would be greatly appreciated.

Thank you.