One approach is to use a reverse image search tool like Google Images or TinEye. Simply upload the photo, and the search engine will scour the web to try and find matches for that image. This can sometimes lead to discovering the person's social media profiles, as their photos may be used across different platforms.
Another option is to utilize people search engines like Social Catfish or Pipl. These services allow you to input the photo and then they will attempt to match it to online profiles, potentially uncovering the person's social media presence. These tools can provide additional details like the person's name, location, and links to their various social media accounts.
Also worth reading: What are the best techniques for editing images for social media platforms? · What are some tips and tricks for taking consistent and high-quality clothing photos for e-commerce or social media use? · Can I get in trouble for copyright infringement if I post someone else's picture on social media without their permission?