If someone has installed the Blue Wallet app on their Android then imports it from the Trust Wallet app by entering the phrase as I explained above, that means that's not a safe step. Maybe you mean a safer step is to move coins by sending coins from the Trust Wallet address to the Blue Wallet address. Is it really like that?
Right. That's exactly Pmalek's point.
If the wallet has been generated by a close-source wallet like trustwallet, we don't know how the keys have been generated and whether they have access to the keys or not.
With importing the seed phrase generated by trustwallet into bluewallet , you don't change anything.