I have found a few “summery” zip collar items worthy of your attention!
We will start with this zip collar denim jacket by KNWLS. I believe its official name is the “Lyra Jacket Oblivion”.
Depending on where you are in the world, a jacket might still be needed in the summer, particularly at night when it gets colder. This is a nice bomber from Urban Outfitters called the “UO Bella Knit Long Sleeve Jacket”.
This is the “Ultra Cropped Puffer Jacket” by Tommy Jeans. Technically a winter jacket, I think this jacket would work great in climates where nights can get colder in the summer and you can currently find it at reduced prices!