It is likely that the device will be sold through a variety of channels, including traditional retailers, online retailers, and MSI’s own website.
The MSI Claw is a high-end handheld gaming device, so it is possible that it will only be available through select retailers. However, it is also possible that the device will be more widely available, due to the popularity of handheld gaming devices.
We will need to wait for MSI to make an official announcement to know for sure where the MSI Claw will be available for purchase.