The west bank is high ground with the Dnipro River next to it.
Across the river, there is typically 2 to 3 km of marsh before the ground rises. This marshland was flooded when the Kakhova Dam was breached. It has now dried out enough for the Ukrainians to attempt to occupy it.
The main Russian lines are further back. They can still command the river crossing with artillery and drones, as well as shell the west bank.