LED "neon" sign dimmer

Hello,

I’m hoping someone can suggest a way to connect my LED “neon” sign to Home Assistant.

The current, manual, way to control it is with this switch. One end connects to power (120V step down to 5V) the other connects to the light. Pressing the middle button turns it on/off and the arrows dim/brighten.

Maintaining the ability to dim/brighten is important.

Thanks!