Based on your description of the problem, I’m not sure if it’s a hardware (e.g. Homey Pro 2023), a software (e.g. Homey Tuya Zigbee App) or a general Zigbee mesh problem.
Perhaps you can provide more information. For example, if you use more than one Zigbee device. And if so, how many of them are Zigbee routers? Are all other Zigbee devices working properly? Have you checked if the 2.4 GHz WLAN channel and the Zigbee channel of the Homey interfere with each other? You can check this on this webpage (Link).
What I don’t understand is, how you can control the curtain motor with its own remote control. Is the rc directly connected the curtain motor like it’s possible with some Zigbee lights and remote controls?
If it’s a problem of the Tuya Zigbee app, you can describe your problem in the corresponding topic about the Tuya Zigbee app.
Didn’t know that some Tuya devices use also RF. I know it’s possible to use Zigbee remote controls to control Zigbee actuator like light bulbs or sockets (see link), but I don’t know if its possible to control curtain motors. That’s why I asked.