If the water is still standing, you likely have a physical blockage (usually a hairball). You need to physically remove it.
If nothing else works, the clog may be caught in the trip lever mechanism inside the overflow pipe. This is common in tubs where the stopper is controlled by a lever on the wall. unblock bath plughole
Hair is the number one cause of bath blockages. If the water is still standing, you likely
This natural reaction fizzes through organic matter without damaging pipes. If the water is still standing
Before reaching for heavy-duty tools, try these gentle methods to see if the blockage is near the surface.