We can use a long and narrow fruit knife instead of a spatula. They have similar appearance and can play a similar effect in theory. Or use a long iron ruler instead of a spatula. In general, long and flat cut things without gaps can be used to replace spatula.
We can see in the cake shop that the staff will use a narrow and long spatula to evenly spread a layer of cream on the surface of the cake embryo, but when we make the cake at home, not everyone has a spatula.
In this case, we can actually use a fruit knife instead of a spatula. Some large fruit knives have round tips and long and narrow bodies. Their appearance is similar, so they can play a similar effect in theory.
In addition, it has been suggested that cream can also be smeared with a longer iron ruler, but it is not convenient to pick it up. In general, long and flat cut things without gaps can be used to replace spatula.