Some devices not detected over a working i2c bus

Hi, I m using this Waveshare UPS Hut to power my radxa zero. The hut powers the board fine, however the monitoring of the current and capacity over i2c is not working. Waveshare already has a script for this that works with raspberry so I’m just trying to port it.

When I run sudo i2cdetect -y 4 (I m connected over pin 7&11) it doesn t show any address. I tested the i2c on these pins with a RTC DS3231 module and it works fine, I can see the addresses show up when scanning. So it works for the RTC module but not the HUT module

Why do you think with some devices it works and with other doesn’t and what can I do to ‘see’ my UPS?