“Made of” can mean “composed of” or “constructed from”. This is the latter:

Savor says they take carbon dioxide from the air and hydrogen from water, heat them up, oxidize them and get a final result that looks like candle wax but is in fact fat molecules like those in beef, cheese or vegetable oils.

The entire process releases zero greenhouse gases, uses no farmland to feed cows, and despite its industrial appearance, has a significantly smaller footprint.

“In addition to the carbon footprint being much lower for a process like this, right, the land footprint is, like, a thousand times lower than what you need in traditional agriculture,”

Good example of how choice of words can mislead, particularly when intentional.