fiddle with margin

static/app/components/timeline/index.tsx

@@ -66,14 +66,9 @@ const Row = styled('div')<{showLastLine?: boolean}>`
  display: grid;
  grid-template-columns: subgrid;
  grid-column: 1/-1;
- grid-column-gap: ${space(1)};
+ grid-row-gap: ${space(0.5)};
 
- margin: ${space(1)} 0;
- &:first-child {
- margin-top: 0;
- }
  &:last-child {
- margin-bottom: 0;
  /* Show/hide connecting line from the last element of the timeline */
  background: ${p => (p.showLastLine ? 'transparent' : p.theme.background)};
  }
@@ -140,6 +135,8 @@ export const Container = styled('div')`
  position: relative;
  display: grid;
  grid-template: auto auto / 22px 1fr auto;
+ grid-row-gap: ${space(1)};
+ grid-column-gap: ${space(1)};
  /* vertical line connecting items */
  &::before {
  content: '';