ionic framework - ion-item reduce width of end slot

ion slotIn the latest Ionic (v5), the button position has changed to slot as shown below: ion-header> ion-toolbar> ion-buttons slot=start> ion-back-button>ion-backion-item elements for iOSAndroid contain text, icons, images, and other custom elements. They're placed in a list and can be input, deleted, edited, and more. ... This list makes use of custom metadata including an unread message