interferon, thanks for responding. Doing another google search for answers I learned that SwiftData and CloudKit only do private databases. So, I need to wait for the next best SwiftData update in order to have a public database. I can wait. So SwiftData and Cloudkit are not using public databases at this time.

UPDATE 2. I double checked and the Mac mini is not updating to the cloud. I deleted my App and re-downloaded it with an old database. So does Macs have separate clouds? I'll continue investigating....

Same, Swift Playground crashes for no reason. I am coding Android Studio apps now.