Well, it turned out Globe Suite will only supports Globe products, even though it uses Tuya’s back-end as its cloud service. This is unfortunate news for many who use Tuya or other Tuya powered brands and wish to get integrated this way. However, this is probably not surprising as they never promised to support non-Globe products and they are providing solution to their customers, which is fair. 
That being said, for those who are still interested in integrating in Tuya into SmartThings, you may have to leverage IFTTT or Alexa as described in the post below by JDRobers, and please note that the state can be out-of-sync if changed outside SmartThings.