Zero day vulnerability discoveries are rising
Zero day vulnerabilities are usually exploited by states or state sponsored actors to spy on enemies, perceived or real. Weaponized zero-days are routinely marketed by outfits such as NSO Group, and probably represent the biggest threat to privacy worldwide.
Both are finding that the number of discovered zero days is rising. Project Zero found 58 in-the-wild 0-days in 2021, the most ever recorded since they began tracking in mid-2014. ZDI is also seeing an uptick and reports record numbers for 2021.
Although the rise may be seen as a bad trend, Google Project Zero points it is most likely due to increased detection capabilities and disclosure of these 0-days, rather than simply increased usage of 0-day exploits. That's a good thing.