Is it possible to change the default sorting of a subtab?

Hello,

We need to change the default sorting of a standard subtab on Service Request object page.

In the service request object there is a subtab in which the contacts of the Service Request are displayed. We want to sort the records displayed by another field so that the main contact appears first. Is there a way to change the default sort order?

We have seen that in the creation is possible to set the field you want to sort by but when editing an existing default subtab there is no option.