I've just joined a team recently and had a chat with the head of product. We will work on a tiny internal app, it has 3 pages: sso login page, Excel template upload page where earlier uploaded templates are shown as a card and if you click on them it opens a dashboard: a map with markers, a bar and a pie chart. This is the whole thing.
This guy asked what we will use in the front-end. I said react and he was like "amazing, good job, it will be great" and the talked about we should always use react. So yes, there are places where react is used without question.
Also, we will use snowflake as a backend while indexing would make everything a lot faster and the budiness logic is done by 800+ line sql (stored procedure).