Hello @Siel Salcedo Thanks for reaching out on this forum.
Did you try other methods such as simple Data Copy activity without Event Trigger?
Are you sure about no Firewall rule issue? You can check if this is the case and configure your firewall settings accordingly.
Did you try with any other Storage account within the same tenant(Same subscription)?You mentioned that the Data Factory has a Storage Blob Owner role on the Storage Account, but you may still want to verify that the firewall is not blocking the connection.
"storage account is not using a firewall or that the necessary IP addresses and ranges are added to the allowed list"
Reference Doc to read: Create a trigger that runs a pipeline in response to a storage event