Timing Cover Leak?

I have a 2019 SR5 4x4 with 49k miles on it. Took it to the dealership for my 50k mile tuneup (transmission and oil change) and they're claiming it has a timing cover leak. From what I can see, the engine and all else is completely dry and I've never had any oil drips under the truck (I only drive it once or twice a week, so it sits in the driveway quite a bit). They tried to upsell me on a few other things in the inspection so I'm not inclined to take it that seriously. What is y'alls take? Should I be concerned or is it just a dealership being a dealership? They wanted $4,200 for the repair.

 

I can't see the pics, so I can't say for sure. $4,200 sounds way less than the going rate which sounds to be well over $10k for the job.
If you think it's dry, I would leave it. Hell for what is costs and what goes in to the job, I would leave even slow seep and maybe even leak.