Lovely craft, in both senses!
Reading a review of the TZ 100 I spotted this:
The firm’s recent 4K Post Focus mode is also included. This takes a series of images at different focus distances and stores them together as a movie format file, which in playback mode effectively allows you to refocus the image by tapping on the screen. Panasonic considers this sufficiently clever to merit its own button on the camera’s back.
I wonder if this movie file could be processed by your focus stacking software.
Mike