I connected the curtain motor to Home Assistant via Zigbee. I don't know whether it works with Ikea Tradfri. But I have also connected Ikea smart lamps to Home Assistant via Zigbee. So it could well be that this could work, as both use Zigbee.

The SONOFF ZB Curtain motor can be controlled both autonomously with the remote control and via a Zigbee connection, but it does not require an additional hub for basic functionality with the remote control. - You can control the curtain motor directly with the remote control, which is included in the scope of delivery. - However, for advanced functions such as remote control via the eWeLink app or integration into a smart home system, a connection to a Zigbee gateway is required.

The scope of delivery includes the remote control and the motor itself. Additional remote controls can be added, they are. Sonoff Smart Home Remote Control for ZBCurtain or the control can be done via an app on a mobile device. The restriction regarding curtains is that they should be lighter than 8 kg and mounted on a track shorter than 3.5 m with a distance from the track to the ceiling of 2 mm. The unit is powered by a rechargeable battery that can be charged via a USB-C port and provides up to 3 months of use - a power supply unit is not included. The microphone is not installed on the device itself, but it can be connected to devices/speakers that support Google Home or Alexa so that voice commands can be made through them