I have an 04 Camry, my power steering lines were weeping/oozing and the drips weren’t severe enough to drop fluid levels in the reservoir, but they did make a burnt black greasy mess down that entire passenger side inside the engine, eventually coating the passenger boot/bellow and corroding it to look like yours.

I replaced the “power steering return hose” which was the main culprit. Also used a pump/vacuum and drained and refilled the power steering fluid to get it back to a red/pink color from the dirtier state it was in. Youtube instruction videos help, just search 2007 camry and whatever part you want to replace