For cybertruck, Is this rear mechanical clicking/clunking motor sound normal when approaching with my phone?

Hey everyone, this is my first Tesla, so I’m not entirely sure if this is just how it’s supposed to be. I took delivery of my Cybertruck earlier this month and have been noticing a specific sound. I initially thought it was normal so I didn’t pay much attention, but now I'm curious. Anytime my phone is in my pocket and I walk into the garage, I hear a mechanical clicking/clunking motor sound coming from the back of the truck. It seems to indicate the truck is waking up or unlocking. Is this mechanical clunking sound is expected behavior?