I was wondering if we can deploy on a testnet and if that will affect our ranking?

by testnet I mean binance testnet or eth testnets. And also which one is preferred?

if you've made a dapp, deploy it on binance testnet

If someone sees this post and doesn't know how to get bsc testnet on metamask and how to get BNB on testnet here's few links.

To set up BSC testnet on metamask : https://academy.binance.com/en/articles/connecting-metamask-to-binance-smart-cha...

get testnet BNB. here's the faucet : https://testnet.binance.org/faucet-smart