This is just optional if you are looking for alternative you can also generate 24 seed phrase using ianColeman tool but for safety you need to run iancoleman tool offline on separate device.
It's good to use iancoleman (offline on an airgapped device) if you want to derive your keys from your seed phrase, But since it generates the seed phrase through javaScript I would never recommend using iancoleman for generating a seed phrase.
For more information on why it's not a good idea to use JavaScript for generating a wallet, click
here and read gmaxwell's explanation.