Swamp biome features a bumpy shoreline.
However, since the version of the unknown bedrock edition, the features have disappeared and swamp has become less fun.

I created a map with 0.9.0, the first version of Swamp Biome added to the pocket edition.
Then I went back to 1.17.10, went into the map, and took a screenshot.
That's the first screenshot.

The second screenshot is the map created with the same seed in the current version.

I don't think this is intentional because the uneven shoreline of the swamp is a characteristic part of Biome, and it continues to be maintained in Java Edition.
Therefore, I think it is something that needs to be improved.