In its threat analysis report, Citizen Lab revealed that NSO Group began exploiting new zero-day vulnerabilities in iOS. Notably, Lockdown Mode thwarted at least two of those serious vulnerabilities, even though the bad actors may have eventually found their way around the shield with new flaws.
https://citizenlab.ca/2023/04/nso-groups-pegasus-spyware-returns-in-2022/
If you’re confused about what exactly Lockdown Mode is, want to know what it does, and if you should put it on your iPhone, here’s a roundup of everything you should know.
https://www.digitaltrends.com/mobile/apple-iphone-lockdown-mode-how-to-use-why-you-should/