Comment 3 for bug 1879305

FWIW https://github.com/CanonicalLtd/subiquity/pull/789 will allow you to open a shell when connecting via SSH.

I think you will need to have early-commands that use chzdev to activate the drive you want to use before you can use it? We should add more explicit support for device activation (possibly to the extent of automatically activating devices referenced by the config) but it's not done yet.