There are several ways to achieve this in Niagara, but the most efficient and straightforward method is to use Particle Attribute Reader (PAR) in the child emitter to reference the parent emitter, then in the child emitter obtain the necessary parent parameters like position, sprite size, scale, color, velocity, etc.
There are Epic’s built-in PAR modules, but you can write your own custom module (I use custom module more often), or you can use Niels custom module: