(https://i.ibb.co/LZwmq4n/photo-2021-07-14-13-00-49.jpg)
AirGap wallet (https://airgap.it/) added the BIP 85 functionality a while back. but now has a blog article (https://airgapit.medium.com/secure-mnemonic-management-with-bip85-9af386159657) about it to illustrate the different use cases.
What is BIP85
BIP 85 defines a way how new BIP39 mnemonics can be derived from your mnemonic. Put another way, it aids you in deriving “entropy” from your mnemonics, and the entropy you derive can then be used in other wallets and applications. Therefore, it brings the flexibility of managing multiple mnemonics (multiple wallets) while only having to back up one of your mnemonics. If one or more of the derived entropies are compromised, the parent mnemonic and other derived entropies remain secure.
read more (https://airgapit.medium.com/secure-mnemonic-management-with-bip85-9af386159657)