@Forscherliga Thank you for reaching out to us, As I understand you are looking for information on Which db tables from SAP solution are monitored by Azure Sentinel.
As per this - https://learn.microsoft.com/en-us/azure/sentinel/sap/sap-solution-log-reference#:~:text=ERP%2C%20CRM-,Logs%20produced%20by%20the%20data%20connector%20agent,-This%20section%20describes it lists down the tables names in Microsoft Sentinel solution for SAP.
Let me know if you have any further questions, feel free to post back.