This is common to wallet like like wallet.dat for Bitcoin Core. There many reasons someone may want to derive the private from seed phrase in order to access the coins. I have told someone before to use it to get access to his altcoin. He used it and was able to access his altcoin and spent it. Also many wallets have the Iancoleman guide because there are some issues that needed there users to generate the private key and import it instead of seed phrase.
You don't need to go details more because I doubt this thread is a fake question.
I smelt it like this and I click on OP profile, what I see is some negative trust feedbacks. I am done here and the link to article of How to back up a seed phrase is my help, but I had to buy benefit of the doubt that OP did not make a fake question.
I still think there is high probability that this question is not from actual demand for help. I stop here and will not return to this thread even you replied me more.
