Pixelate iPhone Screen in Video

There’s a two-hour video where an iPhone pops in and out of frame. Every moment its display is visible I need that area tracked and covered with the same pixelated blur—no fades, no style changes, just a uniform blocky filter that follows the screen edge-to-edge whenever it shows up... (Budget: $10 - $30 USD, Jobs: Adobe Premiere Pro, After Effects, Animation, DaVinci Resolve, iPhone, Video Post-editing, Video Production, Video Services)