your beneficiary needs to know that
otherwise devices usually have single sign on.
Discussion
You meant: Assuming your bitcoin is in Muun Wallet.
1. Your email login & password given to beneficiary privately and personally.
(login details not specified in the will)
2. In your will, it is stated that all the bitcoin in a particular Muun Wallet tied to a particular email address' ownership is transfer to the specific beneficiary upon one's death.
yes. this.