Can you sync data prior to the connector creation?
For the SendGrid connector, we retrieve only the new events that happened after the previous sync cycle. This is based on the data available from the SendGrid API and webhooks.
For more information, please visit the SendGrid Sync Overview.
If you can export the data via CSV prior to the creation of the connector, you could use our MagicFolder connector to sync this.
This is due to the limitation of the data available from the SendGrid API and webhooks.