There is no thatch in the whole mountain, only one grave is covered with thatch. Is it related to Feng Shui?

The grass that grows on the grave will bring prosperity to future generations. This is a good thing. Thatch mostly grows on hillsides and grasslands, and basically grows in ventilated places. Cemeteries are usually in such places, so there is no problem. However, this kind of grass grows very vigorously and has long roots. It needs to be cleaned, otherwise it will cause the cemetery to swell and collapse. If you want to see if there are any problems with Feng Shui, you need to hire someone to do on-site inspection.