it's exceedingly common to use a monochromatic sensor with different filters and then combine them in post. you might use visual filters - e.g., take 3 exposures using red/green/blue filters, but it's also common to use filters for specific wavelengths e.g. hydrogen, oxygen, and sulfur, and then assign RGB to each filter arbitrarily

there's lots of other red flags with this product but I wouldn't care about this one

at 45k$ I do hope they have added astronomy filters to their telescope