Is there a luggage storage at Ho Chi Minh airport?

Yes, there is. It is located on the first floor of the international terminal to the left of the exit to the right next to the Burger King cafe on the street. But the prices there are very high: 27,500 dong per hour or 275,000 dong per day (that's more than 10 US dollars). For more details on everything you need to know about Ho Chi Minh airport, read here - https://nashaplaneta.net/asia/vietnam/saigon-hochimin-airport

How much does a visa to Vietnam cost?
Where to go in Vietnam for the first time?
Where is best to buy tours to Vietnam?
Follow the link, all these questions are discussed in the chat - https://t.me/vietnam_travel_chat