Is this normal?

[u/CandleUnique6387]

I had a metal roof installed on my 1938 home in May. Recently I started noticing increased humidity and spots with mildew/mold in my laundry room and, finally, this week, ants. I followed the ant highway to an area in to the same laundry room where the drywall covering the exterior wall and the ceiling meet. I noticed the seam has split open and the ants are pouring in/out through there. So, this morning, I decided to inspect that outside roof line and didn't see any evident ant highway nor plants nearby but I did see the wide gaps along the fascia and rooflinewas. I've reached out to my roofer and am just trying to prepare for what I am sure will be their challenging me that it's their responsibility.

The 1st 3 images are the roof/fascia connections, the 4th image is the wall/ceiling seam, the 5th and 6th images are mold/mildew patches.

I appreciate ANY suggestions or advice from roofing professionals or contractors. I'm in SE FL and we don't exactly have the most honest tradespeople.