ios – How to dim the light bar of PlayStation DualShock 4 game controller with iPhone

iPhone 8 with iOS 14.4.2

Bluetooth connection & playing games with DualShock 4 works.

There is no option to adjust light bar brightness in - General - Game Controller

What should I do, on iPhone, to dim the light bar?

Jailbreak/Non-jailbreak solutions both acceptible.

I don’t have game console.

Do I have to dim the light with Linux PC before connecting to iPhone to play games?

• Reduce the light bar to minimise drain on the battery
• ds4-led-controller (linux)
• gaming.stackexchange/ds4led (linux)
• gist/ds4led (linux)
• r/RetroPie (linux)
• github/ds4drv/wiki (linux)
• ? (linux)