I think it’s very unlikely that it will work with smartthings.
First, just being zigbee isn’t enough:
Second, zigbee only allows for one primary coordinator per network. Most automated curtains have their own zigbee coordinator built in, which means they can’t be added to a network with a smartthings hub. So the fact that they included a line item for a coordinator means that’s going to be a separate zigbee network from the one you run with smartthings. And the remote can only talk with one network.
So my guess is it isn’t going to work, at least until the matter specifications is fully deployed and devices are made compliant with it and smartthings add matter support. All of which is likely to be two years away if then.