This is not true. It should be a line item on the new orders. It was on mine....
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The fusc started after I placed my order, but before I took delivery. I asked them if they would add it to my car, and they said they would. This entailed petitioning corporate to add the fusc code to my order. At delivery, I asked for confirmation that I was going to get it. They looked up my order to confirm. It wasn't just that one person. I spoke with four different people about this throughout the order process.
It's not a big issue for me. In the last six years of tesla ownership with fusc, I've used supercharging twice. One of those was just to try it out. I thought it would be nice to have it just in case. Might I get screwed? Maybe. I guess I'll know in about two weeks.