In this blog I would like to provide a short click-trough so that you know how to generate a RAP BO using the RAP Generator that I have described in detail in this blog:
https://blogs.sap.com/2020/05/17/the-rap-generator/
The new SAP Fiori Elements based UI works similar to the key user tools known from SAP S/4HANA.
The draft enabled Fiori based UI lets you enter the information that is necessary to create your RAP business object such that it tries to prevent you from entering combinations of data that do not work.
I have moved the how-to-guide to the readme.md document in GitHub.
cloud-abap-rap/README.md at main · SAP-samples/cloud-abap-rap (github.com)