Is the influence of geomantic omen included in and displayed in the eight characters, or is the influence of geomantic omen independent of the eight characters, and can influence and change the origin

Is the influence of geomantic omen included in and displayed in the eight characters, or is the influence of geomantic omen independent of the eight characters, and can influence and change the original eight characters? feng shui is independent from the eight characters, but it must be included in the eight characters when you are just born, which can be inferred from the eight characters. Feng shui can certainly affect the luck of the eight characters, just like saying that one of the same eight characters lives in a dark and humid environment and the other is in a normal environment, then the result must be that the dark and humid person has a bad fate.