Based on this product's specifications, here are some alternatives and similar models
Diffusion camera filter K&F Concept Nano-X 46 mm, double-sided coating, black
Summary description:
K&F Concept Nano-X diffusion camera filter, 46 mm thread size, designed to soften highlights and reduce contrast for portrait and landscape photography. Features double-sided coating for improved light transmission and resistance to reflections. Supplied as a single black filter element; mounts on lenses with 46 mm filter thread to create controlled diffusion effects.