Bip39 standalone https://www.pexels.com/@adele-fanetti-2153528476/ While it utilizes BIP32 system you could nevertheless import BIP39 seeds into Electrum wallet. Also in addition to BIp32 there is BIP44 version which some wallet use to the era of seeds. Some wallets can import numerous seed phrases and a few only have a single standard. https://bookmarkspedia.com/story6228903/bip39-npmjs-a-simple-key-for-bip39-github-unveiled-https-t-me-bip39-chat