You need to edit class clr-treenode-caret in file /usr/lib/vmware-vsphere-ui/server/static/resources9829778/ng-next-app/styles/clr-ui-dark-a11y.min.css and file /usr/lib/vmware-vsphere-ui/server/static/resources9829778/ng-next-app/styles/clr-ui-a11y.min.css
.clr-treenode-caret {
flex: 0 0 1.62rem; ### Edit value here
padding: 0;
margin: 0;
height: 1.62rem; ### Edit value here
width: 1.62rem; ### Edit value here
background: none;
border: none;
color: #acbac3;
cursor: pointer;
outline-offset:-.25rem
}
set 1.2rem to get console like 6.7