Polygon zkEVM has been deprecated. New blocks are no longer being produced, or are no longer being ingested. Historical data can still be queried.
https://wiki.polygon.technology/docs/zkevm/introduction/
More about Polygon zkEVM
Overview
Polygon zkEVM is a decentralized Ethereum Layer 2 scalability solution that uses cryptographic zero-knowledge proofs to offer validity and quick finality to off-chain transaction computation, also known as a ZK-Rollup.