From what I remember you're using the S/4 RTC CT right?
In that case, after you run the CT data will be available for Raising. Had some issues in the begging of my project with the entities as I uploaded them from flat file and were saved with "external" format.
Have you tried using RTCDSRB - Request Data Submission for Multiple Entities?
Check note:
2445455 - Initial Upload, Flexible Upload and Batch Data Submit Requests
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