Does using garlic and ginger or lemon help in relieving covid-19 symptoms also does steaming with hot boiling water help?

Remedies for cough: Mix hot water, 1 tsp. lemon juice & 1 tsp. honey in a mug, then add more lemon juice or honey to taste, if desired. Sip the mixture slowly and inhale the steam from the hot liquid to help reduce congestion in the chest. Or make tea with 2 tsp of Marshmallow root bark per 1cup of hot water (steep in a covered pot for at least 5 minutes). Drink several times a day or as needed to relieve coughing.