Not familiar with that device. But some devices may not have a legit ASIO driver.
Please contact the manufacturer of the Mooer and find out if they have tested this device specifically with the Studio One demo. They may be able to provide setup instructions.
Otherwise, you can try a different Windows driver for the Mooer. Please download and install ASIO4all and test to see if this makes a difference. Presonus in no way supports ASIO4all, but I have seen it help in situations when a device does not have its own ASIO driver, or is using Windows audio.
An ASIO driver provides a low-latency and high fidelity interface between a software application and a computer's sound card.
Make sure to install the ASIO4all offline settings, so you can enable the audio device in the ASIO4all interface.
Then open Studio One > Options > Audio Setup and choose ASIO4all. Start a new song in Studio One. Then in Song > Song Setup > Audio I/O setup, add your channels for input and out.
Also, you can contact the manufacturer and find out if they have tested this device specifically with the Studio One demo. They may be able to provide setup instructions.