If you want to change top and bottom spacing for carousel or spotlight widgets, you can do it with CSS styles.
Step 1: Open Theme Editor
Go to Shopify Admin > Online Store > Themes.
Click Customize
Step 2: Find "Storista Widget" block
Click on "Apps" located above
Step 3: Paste CSS style in the Custom CSS section
.storista-feed-flex {
margin-top: 20px !important;
margin-bottom: 20px !important;
}Update 20px to desired spacing
Step 4: Save changes