Google Cloud's initial Multi-Party Compute service supports conventional ECDSA signing for Bitcoin and Ethereum, with Ed25519 support planned for Solana.

From the articleGoogle Pitches Banks on Splitting Crypto Keys Across Clouds With New Custody Service - UnchainedAlso in Google to preview a new crypto security system as private-key hacks mount, Google pitches banks crypto custody that splits keys, eyes 2027 launch - Cryptopolitan