YA is a HUGE category, more than a genre. It contains all the genres: romance, SF/F, detective, historical, and so on, even occasionally horror. It's comedic and serious, and the serious is all over the place, from fairly innocuous areas such as identity issues in school and parental conflicts, to racism and school shootings.
It's affected somewhat by current events, though less than it might seem, since it takes something like two years for a green-lit book to percolate through to the bookstores. Trying to follow a trend is poor business.
So write whatever really matters to you. There's almost certainly a market for it.