Google typically updates its search engine results page (SERP) gradually, by testing out new features or updating existing ones. However, the company may roll out more drastic redesigns and new search features under certain circumstances, such as when there is heightened demand for information about a new topic, like there was during the outset of the coronavirus pandemic.
Demand for information about the tragic events unfolding in Ukraine may have prompted Google to revamp its SERPs for related queries (like [Ukraine Russia]). While some of the new features may be specific to the conflict, the company may eventually roll out those features (or similar ones) for more queries, which can impact organic visibility opportunities for brands.