You might be able to ‘Scan Nearby’ and pair it as a dimmer switch but I don’t know for sure. There’s some information about a Zigbee driver - but it will depend on the device fingerprint.
It might be a good idea to choose one of their Matter certified curtains so you get full feature support.
SmartThings pairing is just three presses of a button and scanning a Matter over Thread QR code with the ST mobile app.