Good Afternoon Sebastian.
To create a Service catalog request with a corresponding SDM-Change Order, you need to install and run SC, SDM and PAM as an integrated package.
And with a combination of SC-ERA, SC-SDM-Java-Coding(ootb) and PAM-Processes(ootb) then takes care of that.
It is up to you to integrate all of these and then it should work.
When you need further assistance, then please open a standard case?
To obtain full-service follow-up on this through our Level 1 Support Team(s).
Thanks ina dvance and kind regards, Louis.