I don’t mean to rub salt in an open wound, but the fact is your first CVT lasted beyond the stated warranty period and you were still given substantial assistance in replacing it. Your second replacement CVT lasted beyond the stated warranty period. It seems Nissan has done their part to stand behind the products they sell.
In a different vein, we bought a high end washer and dryer. They were warrantied for 12 months. 15 months in the washer needed repairs, come to find out that it is a common failure for Maytag washers, enough so that the parts are on back order. But the washer worked without fail for the 12 months Maytag guaranteed it would. I’m not entitled to any further coverage or remedy for my washer, you’re not entitled to any remedy for your CVT.
Subaru CVTs seem durable, but there does seem to be a pretty high incidence of electronics failures. The shop I used to work at has replaced probably half a dozen valve bodies in the last year or so.