Grass question

Another question arose. I have a grass, each grass is a separate object with the same texture and with its own animation. I want to import into the project so that it is one object, but at the same time not lose the animation geometry (like every grass has it around its own point).
When importing separately, a bunch of unnecessary ones appear, in which it is difficult to figure it out to remove unnecessary ones. At the same time, the geometry union is lost in Blender, and also when the parent is assigned.