Did u try removing it with tongue cleaner ...or backside of your brush

Let's first follow the conservative approach. Clean your tongue using your toothbrush after every time you brush your teeth. Try to avoid using tongue cleaners whether they are plastic or metallic or wooden because they tend to cause more harm than good. Maintain a good level of hydration. If the white layer is not resolved in two or three days then we will look for other options and go for any specific treatment if required. Regards.