I have a Zeimsmart 6 Button Remote (ZM-RM02) paired with a Moe's ZigBee over Matter Bridge (virtual id. eb678e74379aa738a9oumy) & (Firmware 1.11.0). The bridge is connected to the Tuya app and SmartThings.
The Zeimsmart Button (virtual id. eba8889ec82bcf60718ajr) does NOT show up is SmartThings. It works as expected in the Tuya app.