This symbol appears to be some form of generic superlative, indicating that the the object or symbol it is placed under is the “most” or “greatest” of something.  The slight upward slant as you move right along the image indicates that the modified topic is “rising above” other objects of that type, so to speak.  We can see an example of this in FRAGMENT 20220417-02:

This set of symbols likely means “the most ” or “the greatest ”  (The extra symbols aren’t strictly necessary, but may be used to indicate emphasis, or that the relevant quality is “number”/“quantity.”)

In summary, this symbol means “the most” but could be translated as “the longest” or “the largest” in some contexts.