According to the HomeKit guideline, the manufacturer's App can’t affect the settings of HomeKit. 

If you just turn on/off the status LED in eufy App, it will take effect on Home App. But after restarting the camera, the camera will show the status as that set in Home App whatever you set in eufy App. So, if you want to switch the status LED completely, you should turn on/off the status LED both in eufy App and the Home App.