Try to understand how this battlefield 6 logo effect is done

Hello, i would like to do the same glitch effect that there is on the battlefield 6 logo.
My try is that i added a displacement map of the glitch layer (with fractal noise) on my Text layer, as you can see in the attachement, the original logo (bottom) has not the glitch effected everywhere, only on some part on each letter, somes seems almost not affected by the glitch (letter E or F). Also glitch affect only the left side of letters (letter T).
On my test, displacement map affect font everywhere, how to add effect only on some part of the typo like in original logo ?