Polygon PoS

Detailed information on that L2 and risks associated therewith can be found here and is summarized for your convenience below.

Polygon PoS is a side chain interacting with Ethereum through “public” plasma checkpoint nodes (PoS). It is fully compatible with the Ethereum Virtual Machine (EVM), which means developers can deploy Ethereum smart contracts on Polygon without any modifications. This compatibility facilitates a seamless development experience and interoperability,

While Polygon PoS is designed to be secure, the reliance on a smaller set of validators compared to Ethereum's global network of validators (post-Ethereum 2.0) can potentially increase vulnerability to attacks, such as collusion among validators.