Unfortunately this service only generates BTC native addresses. You should consider switching to BTC native segwit addresses to support all bitcoin shipments at a lower cost.

I also suggest a feature so that users can download the phrase seed into the txt extension when creating a new wallet, manually copying the seed phrase is not efficient. Also the private key export feature of each address such as blockchain.com might be better. Saving only 1 seed phrase for several addresses I think is very risky.