This amswer varies from place to place. There are many public areas, such as restaurants, offices, and shops, that do not allow vaping inside. However, some places allow to vapes. It is advised to look for no vaping signs before vaping or ask for permission.
Some vapes like nicotine free vape is not harmful. However, it is advised to open windows at home. In short, vaping inside is not banned, but you must do it only at allowd places.