I don’t think Matter is currently the integration method for that device, and it certainly wasn’t last year as their matter bridge only came out a few months ago.
Instead, there is a cloud to cloud integration available for some Tuya devices. You connect the Tuya device to a tuya hub and the Smartlife or tuya app. There is then a cloud to cloud integration available between your Tuya account and your SmartThings account. But it’s a pretty limited integration and often has to be done via scenes created in the Tuya/Smartlife app.
FAQ: How does TuyaSmart Integration work? [Updated 2023]
Tuya support may have called it a “bridge” last year, but it definitely wasn’t a “Matter bridge” because they didn’t have one then. And it wouldn’t have been a local integration. 