It could be the SmartThings device type isn’t supported by google? You could try changing it to generic zwave device or similar and see if it shows up on google home app. You can always change it back, it’s just a drop down menu in the IDE. I’ve also read a few people created virtual devices that google does support, and using those virtual devices to control the blinds as well.
Basic Version:
- Go to https://graph.api.smartthings.com/
- Login and then click on My Locations, then click on your hub name.
- Login again (if it asks you to, sometimes it won’t).
- Go to My Devices, then click on the device name for the shade
- Click on Edit, and under device type, choose Dimmer Switch or Z-wave Dimmer Switch Generic and save.
- Now once you do that on all the shades, you may need to allow google to control the new device in the ST app under smart apps or automations>google>check in the box to allow your device to be seen by google. I believe google refreshes your devices every 5 minutes or so. I don’t think you need to re-authorize smartthings in the google home app for new devices to show up. TEST
- Enjoy!