The opposite of didactic is non-didactic. While didactic refers to something that is intended to teach, often with a focus on moral instruction, non-didactic implies a lack of intent to teach or provide a moral lesson.
For example, non-didactic literature or art may prioritize aesthetic experience over instructional content. In contrast to didactic approaches, which can sometimes come across as overly preachy or instructional, non-didactic methods might allow the audience to derive their own meanings and lessons from the material, fostering personal interpretation and reflection.