You can find utilities like the Geotagged JPEG to KMZ converter that can help you generate Google Earth's KMZ from a directy of JPEGs. Probably something to do with GPS navigation software.
Convert JPEG bitmap image format to Compressed Keyhole Markup Language (Google Earth) data.
We found 3 software records in the database related to .jpeg to .kmz file format conversion.
Microsoft Windows software - convert jpeg to kmz on Windows
A small JPEG to KMZ converter
Convert from jpeg file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned jpeg to kmz. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A software used to geocode pictures
Apple macOS / Mac OS X software - convert jpeg to kmz on OS X
3D modeling application for Mac