You can use terra station for that. Just like this, you are downloading the terra station https://docs.terra.money/docs/learn/terra-station/download/terra-station-desktop.html it's also available for mobile.

Install it and then try to generate a new wallet and write your seed phrase into the paper to make sure if you are the only one who can access your wallet use your seedphrase.

That's the only way for you to generate a paper wallet since terra station was also using similar method like metamask unlike mycrypto based on ethereum network that let you to download paper wallet that automatically generated once you created the new wallet.