Let me know viewable / searchable log retention period on Log Analysis function of Managed WAF.
Detailed logs over the obtained portal Firewall Function: 1 week (7 days).
Log acquired in the security function (security detection logs): 3 months
It does not ensure integrity of obtained logs. In the event that the Customers would like to obtain the log results for a longer span of time to review the search result, then Customers are advised to transmit to sys log server which Customers are managing.