I understand the frustration that you could experience if the ng add command isn't working on your side.
But so far we are unaware of any issues related to it. I just tested it in a local project using Angular 9:
and can confirm that it functions as expected. It seems that there is some project configuration issue causing the reported undesired behavior. Let's keep any further communication on this topic in the following thread:
I have already answered the second question in the following public thread:
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