Bip39 seed to private key https://papaly.com/1/eMEf Despite the fact that it takes advantage of BIP32 strategy you can continue to import BIP39 seeds into Electrum wallet. Also apart from BIp32 There exists BIP44 Model which some wallet use with the technology of seeds. This may explain to you vacant balances. https://whitebookmarks.com/story20853936/bip39-all-words-the-5-second-trick-for-bip39-mnemonic-code-converter-tool-https-www-youtube-com-channel-ucupxfytj0fb78sq55hu6ocw