Some, but perhaps not all, car companies tend to be less than friendly with recalls. My Porsche has never had fewer than three recalls and they really turn the screws on owners. My Taycan has faulty brake lines that have been ordered but magically not found when I bring my car in for the recall repair. This has happened three times. The working theory from owners is the brake lines are ending up in Certified Preowned Cars since they can’t sell them without the parts.

Usually by the time the NHTSA has them send a second notice the parts magically appear in stock. The same has been true for the NEMA 14-50 plug recall (Running 40A over 10AWG wire - setting walls on fire, melting outlets, melting plugs) and a few others.

Porsche has been reasonably good about software fixes, presumably since they don’t cost as much money. They are not great at applying them and not much is done OTA.

Until they do a nicer job here we hopefully will see the NHTSA continue to broadcast these recalls and embarrass these companies into action. When you have issues getting things fixed you can complain to the NHTSA and they do follow up.