If you cannot find a newer version than your current one, (OpenWrt not officially supported on F3 – only on F3 v1? No, F3 is Realtek-based, no custom firmware).

Go to: https://www.tendacn.com/en/support/download-cata-1.html (International) Or https://www.tendacn.com/cn/support/download-cata-1.html (Chinese)

As of the most recent updates, the latest firmware version for the Tenda F3 (Hardware Version V3.0) is approximately or newer, depending on your specific region.

: It is highly recommended to perform a factory reset after the update is complete to ensure all new settings apply correctly. Download Center - Tenda Global