Russia Ukraine war, page-21531

Its NOT about being the biggest producer.

China is a Net Importer of Wheat. And India export most of its wheats to its neighbouring countries.

Its about being the biggest exporter, and that is Russia. Ukraine (due to war) won't be able to do planting, but even if they were successful in planting, won't be able to bulk export as their ports are under blockade.

So in the short term, you just can't replace them. That means expect prices to go much higher in Europe.