I do not see the option to add the version. Just want to confirm this is not possible today.
Sending Record Version in External Event Target
The only system field that we automatically include in EventBridge payloads by default is nwId.
If you are a Nextworld customer or partner, you can also work with your system administrator to submit an official enhancement request with customer support. Include a link to this post in the support ticket. If you’re not a Nextworld customer, keep an eye on release notes. We’re always making improvements.