We completely forgot about the bathroom and kitchen exahust fans as well as the plumbing vent, so had to stick them in after we were finished with the roofing. It wasn't such a big deal, I got some experience pulling up existing shingles when I built a dormer for the minisplits we added to the house to get AC.

Here you can see our plumbing vents. I opted to combine them all to have just one hole in the roof.

A glimps of the inside of the roof vents for the kitchen exahust fans.