Default data Google Ads accounts

In Looker Studio under “default data,” I was always able to select all Google Ads accounts, and the corresponding reports would appear. However, my Google Ads accounts now seem to have disappeared… this seems to be due to an authorization or permission issue within the MCC connection. Is there an option to make them visible again without having to remove and reconnect the old account? In that case, I wouldn’t be able to retrieve the old reports.