Earlier quoted context omitted.
There is a nice PBS documentary about Pegasus's NSO https://www.pbs.org/wgbh/frontline/documentary/global-spywar... . It looks like NSO is backed up by the Israeli government. They say their software is only sold to governments which were previously vetted, but the reality is that most of the time they sell to authoritarian states which monitor and persecute people opposing the regime.
The way this works is that in addition to the more colorful clients, you absolutely need to make sure that you have a sufficient number of clients among law enforcement and security services in countries with a decent(-ish) track record regarding human rights. This way, your products and services are not obviously illegal. You can even tell your employees that your products and services are saving lives because it's…
No way any reputable OS vendor would agree to enable, for example, Dutch intelligence services spying on Russian citizens living in the UK.