In January, Hawaii-based influencer Kyla Neumann bought remineralizing gum, a product that had gone viral, from TikTok Shop. But when the box arrived, it had a different name than what she’d ordered.

Consumers lost almost $2 billion to social-media scams last year. Here are some red flags to watch out for. In January, Hawaii-based influencer Kyla Neumann bought remineralizing gum, a product that ...