The fact that crimes happened is not pressure upon governments to act upon them, no.

Governments generally only respond to public pressure or existential threats to their power and control and revenue, and little else.

> The existence of the war crime allegations isn't being removed.

Oh, but it is. The direct witnesses' accounts are minimized and ridiculed for lack of evidence, then the witnesses stop talking about it (normal ones; the crazy ones keep ranting about it forever) and the matter is totally gone within a generation. A historian might dig it up a few decades later to make a career and by that time it's too old to be relevant.

Consider these major events before they were part of accepted reality: NSA spying, coronavirus, the Holocaust, Uighur ethnic cleansing, Tuskegee syphilis experiments, etc.