I have a few questions about how to change certain parts of the layout of the collection page especially on mobile.
1. How could you make the product display image larger?
2. How could you decrease the amount of space between the product title and it's display image on the collection page?
3. How could you decrease the amount of space between rows?
4. How could you decrease the line spacing in a product display title.
5. How could you decrease the space the collection title takes up?
I could provide a url and password if that would help.
For that, I need to analyze your website and then I can provide any solution over here.
So Please provide website URL and if your store is password protected then also provide password.