The part how they cloud technically access all relevant files, seems easy to me. As mentioned in other comments, just give someone or somewhere you trust your master password.
Virtually impossible, that my dear ones actually can make any use of this. They don't even know how to use a command line, not to mention how to decrypt a luks partition. In the end, they will get some linux friend to do this, copy all files on a nfts external drive and hook this up to a Windows machine. So glad, I don't have to experience this monstrosity anymore.
Long days and pleasant nights!