Short answer: Yes
Mentos UK’s website confirms Mentos Fanta Orange sweets are vegan. They are also gluten-free and suitable for nut allergy sufferers.
Here’s the list of ingredients: Sugar, Glucose Syrup, Orange Juice from Concentrate (2%), Coconut Oil, Acid (Citric Acid), Starch, Flavouring, Maltodextrin, Cocoa Butter, Thickeners (Gellan Gum, Cellulose Gum, Gum Arabic), Emulsifier (Sucrose Esters of Fatty Acids), Glazing Agent (Carnauba Wax), Colour (Beta-Carotene)