For example hardware wallets use them from a single root you can generate separate keys for Bitcoin (with path m/44'/0'/0'/0) and Ethereum (path m/44'/60'/0'/0).Binance Chain extension wallet would use a similar way to generate keys as Ethereum, i.e. derive the private key using BIP32/BIP44 with HD prefix as "44'/60'/", which is the same as Ethereum's derivation path.