Hi:
Theoretically the processor and chipset would support 2 x 16 GB of DDR3L memory but the odds are against you for it working.
The service manual states the max is 2 x 8 GB of DDR3L memory.
HP ENVY Notebook - m7-n109dx (Touch) (ENERGY STAR) Manuals | HP® Customer Support
The Crucial memory report indicates the max is 2 x 8 GB of DDR3L memory.
Memory RAM & SSD Upgrades | hp - compaq | envy m7 series | ENVY m7-n109dx | Crucial.com
You can only install DDR3L memory in your notebook.
DDR4 memory runs at a different voltage, has a different number of contact pins, and the slot in the memory is cut in a different place to prevent someone from installing the wrong memory in the slot.
It would be a complete gamble on your part to install a 16 GB memory chip.
They are also very expensive too because very few notebooks could support a 16 GB DDR3L memory chip in one slot.