Google News — They have their own crawler and their team told me they can only crawl html. If this is our main problem, it would explain a higher drop in newly published articles that rely on getting picked up within seconds.
Links to sources mentioned:
Angular SEO best practices — https://www.youtube.com/watch?v=JlP5rBynK3E
Angular Server Rendering — https://www.youtube.com/watch?v=0wvZ7gakqV4