FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
Article Id 292368
Description This article discusses Log view features.
Scope FortiGate or FortiGate Cloud v23.4.
  1. The maximum number of rows that can be viewed or displayed and exported at a time is 2000 when logging in to the FortiCloud portal. This applies to 1-year log retention subscription as well. 
  2.  On the Fortigate itself, to get more logs, the log location as 'FortiGate Cloud' on the right corner of WebUI, under Log & Report -> Forward Traffic. The maximum number of rows that can be viewed or displayed is 40k. But, it has to keep on scrolling down manually.
  3. For others refer to: Frequently asked questions