At the earliest time, there was no Taoism, only some practitioners who pursued immortality (whether true or not). For the core goal of practicing Taoism, these practitioners developed alchemy, geomantic omen and seeing each other.
During the Eastern Han Dynasty, many practitioners were influenced by foreign religious pressure, so Taoism came into being. Although Taoism originated from cultivating immortals, in order to maintain its position. Like Buddhism, it gradually became a tool for the rulers to fool and began to separate some factors that were not conducive to its own internal. Feng shui, alchemy and so on are all included. Of course, some sects have absorbed these factors instead. Some practitioners have never joined Taoism. Others can watch Feng Shui or alchemy, but instead of pursuing long body, it becomes the last memory of giving up everything. We can't generalize.
In short, Feng Shui is a small skill, and you can't get real freedom. But Taoism does not represent immortal practice. Both of them are just a branch of cultivation.