To the untrained observer, this glyph from RECOVERED FRAGMENT 20220417-02 would appear to be a double-headed arrow, implying some kind of equivalence between the left hand side and the right hand side. Perhaps, that one may freely convert between the two.
However, I posit that the Atlantean culture would not treat arrows with the same cultural significance as their neighbours. Given that the image is of a line with an arrowhead which is disjointed from an angular object on its right, I posit that this glyph is in fact an atlatl, a spear thrower. The spear is in the process of being hurled to the left from the atlatl, implying a level of asymmetrical conflict inherent in the image.

In conclusion, to me this glyph says that if you have a sentence X [Glyph] Y, then Y damages, disrupts or destroys X or more generally it causes it to not be true. In some contexts, it might be used as the word “except”.