Most of the "proof of stake" coins are some form of delegated proof of stake, usually with an opaque and shady set of highly compensated validators with hidden connections to the project. Effectively proof of authority masquerading as proof of stake. This lets them have big TPS bragging rights while maintaining the appearance that they are running a decentralized blockchain rather than a centralized database with extra steps.

Real, decentralized proof of stake is a hard problem that has only just started to become reality.