Homelander likes to keep an eye on the news. He isn't obsessive, it's a passive hobby; scoping out the up and coming hero-hopefuls.

He hadn't anticipated you.

You, some nobody hero with a sudden spike in popularity. You aren't affiliated with Vought; you were no one but now you're someone. Someone with popularity rivaling his own. So when he sees you while out patrolling, he can't help himself.

"Ah—you're that new hero!" He floats gracefully, touching down beside you on the roof.