Create Shamir backup from exist seed

Hello.

I wanted to know, is it possible to create a Shamir backup on an existing seed?
Let’s say I have a seed on another hardware wallet and I want to migrate to Trezor and apply the best security practices I can including the Shamir back up and destroy the seed afterward.
So instead of having a single seed that can be stolen/destroyed, etc… I want to have multiple private keys that I can distribute in multiple places.
If it’s not possible, is it possible to create a new Shamir backup and get the seed from Trezor in order to restore on another hardware wallet that does not support Shamir backup?

I can use trezorctl interface or the ui interface.

Hi,

it’s not possible to change existing single seed to Shamir. Shamir even uses different words. Feel free to read more on Shamir: Shamir Backup - Trezor Wiki.

Since Shamir backup is new thing, most of the wallet don’t support it yet. Cobo Vault has implemented it already and I am sure other wallet providers will follow.