The amount of time that Apple sat on this is telling. First reports on NSO activity are from 2016, Facebook filed in 2019, Apple iOS 14.8 fix released in Sept 2021. Only when the constant negative news about NSO started chipping at their reputation, did they decide to make this symbolic (and ultimately ineffective) move.
Read the New York Times article. It says that Apple was only able to file this suit because of a court ruling in a similar suit by Facebook and because it was given code that showed it how Pegasus works. There is nothing at all "telling" about Apple's timing.
> NSO Group and Candiru (Israel) were added to the Entity List based on evidence that these entities developed and supplied spyware to foreign governments that used these tools to maliciously target government officials, journalists, businesspeople, activists, academics, and embassy workers. These tools have also enabled foreign governments to conduct transnational repression, which is the practice of authoritarian governments targeting dissidents, journalists and activists outside of their sovereign borders to silence dissent. Such practices threaten the rules-based international order.
https://www.commerce.gov/news/press-releases/2021/11/commerc...