Bip39 Onekey Default number of iterations used in wallets is 2048. Raising this number must help it become safer against brute power attacks, on the other hand you will have to shop this benefit. To obtain your wallet with custom PBKDF2 you need to use this script (or similar) to https://bookmark-nation.com/story18511914/bip39-mnemonic-words-seed-phrase-generator-no-further-a-mystery