Regular chewing can contribute to strengthening facial muscles and tightening the skin.
Cocoa Butter Massage:

Melt a few tablespoons of cocoa butter in the microwave.
Allow it to cool a little.
Massage the chin and neck area with cocoa butter for several minutes.
Repeat this process twice daily, in the morning and evening, to enhance skin elasticity and reduce double chin.
Egg white mask with honey and lemon:

ingredients:
Two egg whites
A tablespoon of milk
A few drops of peppermint oil
A tablespoon of honey
A tablespoon of lemon juice

Apply the mixture on the face, neck and chin.
Leave it for 30-40 minutes or until it dries.
Wash it with warm water.
Repeat this process once or twice a month.
Remember, spot reduction is challenging, and a comprehensive approach that includes a balanced diet and regular cardiovascular exercise can complement these targeted exercises. Additionally, consult your healthcare professional or fitness expert before starting any new exercise or skin care routine.