Anyway, what's your aim on getting the private key from your seed phrase?. Both let you access the wallet when you import to a wallet provider that supports it. You can try using https://iancoleman.io/bip39/ but first you must open the site and then turn off your internet connection just to be safe before typing the seed phrase and to get the private key of your bitcoin wallet or other crypto. Take note, I am not responsible if you may lose your crypto funds. I also tried it and I did get the private key of my wallet with the same address from my seed phrase and you can also check the private keys of other wallet address from same seed phrase.