Why must I be on the Mainnet to use Burn Redeem or claim page? I can't deploy to Goerli?

I want to make a Claim Page, but want to test it out before deploying to the Mainnet. However, when I try to create it on Goerli it says I must use the Mainnet. What’s the reasoning behind this?

I don’t want to burn real ETH just to test out some things