We don't have such structures in the UK, but we know what they are. I would call it terracing to distinguish it from the more usual meanings of 'terrace'terrace here as a stepped standing area"stepped standing area", a row of joined houses"row of joined houses" or a domestic outdoor area"domestic outdoor area".
Lexico has
terracing
NOUNTerraced ground.
The Banaue creations, covering thousands of hectares, are the world's finest example of rice terracing.