The board-id is tied to the firmware you install. To get the board-id of the Pico-Lipo, you will have to install the correct firmware. But what you probably need is a (non-existing) variant of the Pico-Lipo firmware with the dv-stuff activated.
Also keep in mind that you may not be getting access to the full 16mb?
There are custom Micro Python images out there, haven’t seen this sort of thing for Circuit Python though?