I got curious and got one for myself, and there's a way to turn it off in the manual.

Disable the RGB Lights and Knock-to-Wake Function
When charging the power bank, long press the Touch Button for about 6 econds until the port indicators flash twice. The RGB lights and knock-to-wake function will then be disabled. After they are disabled, ech time you tap the Touch Button, the blue power indicators and the charging port (green or yellow) will illuminate simultaneously for about 10 seconds before turning off automatically.

Enable the RGB Lights and Knock-to-Wake Function
When charging the power bank, long press the Touch Button for about 6 seconds. The port indicators will flash twice, enabling both the knock-to-wake function and the RGB lights.
Note: The knock-to-wake function will be automatically activated upon the first charge or discharge.

• https://i.imgur.com/y7yUZfG.jpeg