I love the comments debating over what chip specification should be advertised... if a chip is stable at 2.2 GHz, and many are unlikely to perform at 2.4 GHz, it should just be advertised as a 2.2 GHz chip (despite many being able to perform better).

The BCM2711 in the Raspberry Pi 4 model B (even the older B0 revision) was clocked at 1.5 GHz by default to save on heat, and for stability, even though most (in my testing, all I've ever used) can run at 1.8 GHz without issue in most environments, and 2.0 or more with better active cooling.