Reset wifi settings without factory reset in Android TV?
This depends on your version of Android, in Android 4.4 (KitKat) or lower the only option is a factory reset.

With the introduction of Android 5.0, including Lollipop, Marshmallow, Nougat, and Oreo versions of Android, Google added an option that is usually located in Settings - Backup &amp; Reset that is called Network Settings Reset, which will reset all network related settings including all WiFi, Bluetooth, and Cellular Data settings back to their original factory defaults.