There's a tab called Manage Consent under Admin > Data Source where you can change the consent status of all users from a single data source.
Access the Data Source Tab
Select the circle icon containing the first initial of your name in the upper right corner to view a drop-down list.
Select Admin from the drop-down list.
Select the Data Source tab or scroll through the tabs using the arrow on the right side of your screen to select the Data Source tab.
Select the Manage Consent tab.
Check the box in the Consent column next to any data source that you want to change the consent status of all recipients from non-consent to consent.