Yes. Prime Minister Shmyhal Did Publicly Commit A Serious War Crime.

https://wap.business-standard.com/article/international/kyiv-seeks-to-seize-russia-s-assets-for-post-war-recovery-ukrainian-pm-122042900744_1.html

In violation of the Ukrainian military's own rule book.

https://ihl-databases.icrc.org/customary-ihl/eng/docs/v2_rul_rule52

Presumably the International Criminal Court (ICC) are watching closely. To see what sentence he will receive.

Meanwhile the hasty deflective counter accusation merely describes; "Requisition."

https://news.sky.com/story/ukraine-war-russia-putin-news-live-nuclear-latest-updates-12541713?postid=3809152#liveblog-body

Ukraine and Russia both have an obligation to feed people in their areas of control.

Unlike yachts, buildings, artworks etc. Anything else NATO are looking to pillage.

Grain is a perishable commodity. If you don't use it then it goes to waste.

So Russia actually has a legal obligation requisition things like grain.

Much as Ukraine might despise the idea. Everyone has the right to food.

Even Jews.