F150 Rattle on coldstart

Hey everyone. I'm an electrician, not a mechanic, so I'm going to need some help here.

My 2019 F150 (59,000 miles) makes this sound only in cold weather cold starts (currently 19F°). It stops after 5 seconds and won't make the sound the rest of the day. (Go to work for 10-13 hours, come back and works fine)

Really only does it in the morning.

It did this last year when I bought the truck used but this is the second time it's been this long and loud.

IS THIS NORMAL? Should I take an emergency trip to my mechanic? Thanks!

Truck runs completely fine btw.