In one of the YouTube channels of Techno Arena, they performed how they took photos and videos about Samsung Galaxy A55 and A56 smartphones.

The common daytime image is taken on A55 and A56 in terms of similar quality. Moreover, if everyone is in the frame, the A56 offers a slightly brighter picture. But if there are many white areas in the image, the photo is brighter on the A55.
When comparing a photo taken on Ultrashik, it is clear that the quality is worse for A55. However, he eliminated people in the afternoon than A56.

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In addition, the detailed difference is when using 2 zooms. A56 offers clearer and more realistic images A55.
For a selfie camera, the photo on the A56 looks better, even in the afternoon. You can get used to the examples of the image above.
Video of quality and stability recording both smartphones is the same. Images on A55 brighter, and on A56 – darker and with the best dynamic range.
Conclusion
In general, the Galaxy A56 has improvements from the viewpoint of the camera. This is especially true for the front lens. But the difference between him and the A55 is not too significant.