New in Unreal Engine 5.6 - the WATER ADVANCED plug-in, featuring the SHALLOW WATER RIVER actor. This was featured at Unreal Fest 2025 in Orlando in the Witcher 4 Tech Demo.
https://dev.epicgames.com/community/learning/tutorials/OZMa/new-in-unreal-engine-5-6-turn-your-water-body-river-into-a-game-ready-niagara-2d-fluid-simulation