We construct a request type and workflow demands and another request type and workflow projects. When we transform a demand on a project, using a step of executing native (CREATE PROJECT). Two fields are not loaded, all other fields are automatically loaded.
Project creation requires fields like Project Manager, Start Period, End Period and Project Name. If you aren't already populating these in your demand then the project creation will error out. Since you mentioned two fields are not loaded, you can make them required using status dependency on the demand, and make sure the fields are editable for user before project creation.