Bip39 docs https://josueaqpi312.huicopper.com/leading-5-online-bip39-generators-for-easy-copyright-security Although it makes use of BIP32 approach it is possible to nonetheless import BIP39 seeds into Electrum wallet. Also apart from BIp32 There's BIP44 version which some wallet use for the technology of seeds. BIP39 is like a chance to “go through” and understand the seed phrase. https://bookmark-nation.com/story20475992/when-was-bip39-introduced-the-definitive-guide-to-bip39-converter-https-dzen-ru-bip39-phrase-com