I was able to retrieve my ~/Library/Messages folder from a backup and copy it to a new Parallels macOS VM under the my Home folder on that VM. When I logged into the VM, I saw all my old messages.
Transferring Messages from old Mac to new Mac
I was able to retrieve my ~/Library/Messages folder from a backup and copy it to a new Parallels macOS VM under the my Home folder on that VM. When I logged into the VM, I saw all my old messages.