By Richard Horgan Los Angeles (Knewz) — In 2018, it was 44 percent; in 2020, it was 52 percent. And now, according to the latest research from the TV Parental Guidelines Monitoring Board, 56 percent of parents say they have used parental controls for their children’s access to TV content that go beyond those on cable-satellite or via V-chip. Think mechanisms offered through mobile devices, apps, cellular companies and streaming services. Those streaming services remain the dominant delivery method for children’s content in households, with 86 percent of parents indicating that’s how TV shows a…