Always with the disinformation.
Ukraine's main exports for grain are obviously not in Europe. https://oec.world/en/profile/country/ukr/
There is no need for accusations like this. There is a grain glut in Europe to the extent that Poland and other countries are closing their borders to imports (I think it has something to do with the fact that's it's difficult ship over the black sea due to obvious reasons and the land routes are lacking in capacity).
https://www.theguardian.com/world/2023/apr/17/slovakia-joins...
But misinformation is rife in the whole discussion and most others in the same topic. As soon as anything about Russia is discussed, we get a spirited comment section telling how well Russia is doing, how West is failing, and how Ukraine would be better off by just voluntarily ceding its lands that actually belonged to Russia all this time anyway.
It's the costs of transporting the same amount by land. Bulk carrier takes ~50000t, you need ~2500 long semis to haul this amount at best. Include the gas, drivers salary etc.
Doesn't seem like there is much demand for Ukraine grain.