Comparing BCH to BTC

This means that Bitcoin Cash (BCH) sent to an address on the Bitcoin (BTC) blockchain will never appear nor be present on the Bitcoin blockchain. ... If you have the same backup phrase for both your BCH and BTC wallets, then the sent BCH will automatically show up in your BCH sub-wallet, so you don't need to recover them.

You can't transfer coins from the BTC to BCH network without exchanging them, and if you are sending your BCH to a Bitcoin address without conversion, your coins will not leave the Bitcoin Cash blockchain.