Most tools or websites claiming to let you view Facebook profiles or stories anonymously are:
To draft an anonymous post on Facebook, you typically use the feature within a group, as regular profiles do not support native anonymous posting. How to Draft and Publish an Anonymous Post Facebook Anonymous Viewer
For those concerned about privacy on Facebook: Most tools or websites claiming to let you
These tools fall into three categories, all harmful or useless: The Myth of the "Anonymous Viewer" : Viewing
Meta's new Instagram Plus plan lets people view Stories anonymously
Because of Facebook’s strict privacy settings and encrypted data, most third-party "viewers" are either ineffective or high-risk. Here is a solid breakdown of the reality behind these tools: 1. The Myth of the "Anonymous Viewer"
: Viewing a story and then immediately blocking the user, which can sometimes remove your name from their viewer list.