If the information I've provided was helpful, give us some reinforcement by clicking the 'Solution Accepted' on this Post and it will also help other community members with similar issue. If you select Never, the backlight remains on which could quickly drain the notebook battery power.

Press the spacebar to open the keyboard backlight settings, and then select the timeout setting you want. In the Built-in Device Options, select Backlit keyboard timeout. Navigate to Built-in Device Options, and then press Enter. When the BIOS opens, use the arrow keys to navigate to the Advanced tab.

At the top-right corner, make sure you select the keyboard. Select Lighting located on the left navigation sidebar. Restart the notebook, and then immediately press the F10 repeatedly until the BIOS opens. In order to animate the colors of your backlit HP OMEN laptop, follow these seven steps: Open OMEN Command Center from your Windows taskbar or via Windows Start menu. Your BIOS version and screens might vary. NOTE: Not every Notebook support this feature. If there is not a setting for the backlight timing in the BIOS, this behavior might not be supported on the notebook. It might be necessary to press the fn (function) key at the same time to activate the backlight key. If the back light icon is not on the F5 key, look for the backlit keyboard key on the row of function keys. If the blacklight stays on for only a few seconds, the backlight timeout setting might need configuring in the BIOS. turn keyboard back light on or off, press the F5 key.

Have gone through your Post and I would like to help

Backlit keyboard settings windows 10 hp