be on the radar (screen)

To be considered important or noteworthy; within the spectrum of (someone's) awareness, attention, or consideration. If you want this issue to be on the radar of mainstream America, you have to frame it as something that will hit people in their wallets. The band was hugely popular in the '80s, but they haven't been on the radar screen in the last decade or so. That kid's a good defensive player, but he'll never truly be on the radar until he's able to hit consistently.