Speed / frame update rate affects geo; your effect would require interpolation that is not part of Unity’s trails
using trails to do the geo you have to slow the animation down and start it before your effect
the textures needs to pan across the geo to appear and vanish how you want
finally the trail geo gets cleaned and deactivated.
if you can’t pre animate the trails over 2-3 seconds you have to use a mesh you model and pan textures across that geo; colloquially called soulercoaster