yeah exactly, I wasn't sure how to set up the passphrases with multisig, especially in a way that also works with unchained.
So if I import the xpubs into wallet software like sparrow, I should be able to see which root addresses a given address is derived from, right? That way when I'm depositing with a brand new address, I know which bucket I'm depositing into?
I don’t quite get your question but let me explain in my own way, when you set up your seed phrase with a passphrase that gives you wan entire different master public key with that wallet without passphrase. This master public key is what you will use to communicate with other the other multisig co-signers to create a new wallet.
For example in a 2-of-3 multisig wallet creation, create the three co-signing wallet with just seed phrase. Then creating a new multisig wallet you can use maybe co-signer A seed phrase and add a passphrase to it, this changes the master public and creates a new multi sig wallet from the first one even with the other two co-signers not adding passphrase but sticking to their own seed phrase alone like in the first setup.
This is somewhat advance so you might as well be careful or just set a single sig wallet with different passphrase