To hide sections of the order overview section, you can simply add custom css to the 'customize > custom css' section of our app. we've listed below the required CSS to hide each section, with a screenshot highlighting the section that would be hidden if you add the code above it:
.os3 {display: none!important;}
.os4 {display: none!important;}
.os5 {display: none!important;}
.os6 {display: none!important;}
.os7 {display: none!important;}