Need help improving performance

Im making a 2D pixelart game about space and im having a bit of a performance issue, im trying to have around 500-3000 individual planets in the level all of consist of 3 polygons with 3 materials instance for each all of them in unlit, there is no light in the scene and is rendered in unlit mode. is there anything i can do to increase performance or do i have to cut down on some parts?

[USER=“711330”]Plss man[/USER] I think there’s an equivilent of instancing for 2d: