Canon can produce a APS-C R body for whatever price target they want. It probably costs less for a mirrorless when you look at the total lifetime cost including repairs and a separate production line for EF-S lenses.
They are planning a FF body for under $1000, so there is no issue with dropping a few bells and whistles, smaller LCD, add-on EVF, they could hit $500 if they wanted. The goal is to sell RF lenses which are very profitable. That was even mentioned in one of the financial reports.
One reason RF lenses are very profitable is because for the most part they're selling for prices well above consumer grade EF and, particularly, EF-S lenses.
It seems to me Canon has made it fairly clear that the entry level into the RF system will be full frame.
If there are any APS-C RF bodies, and I think there will be, they won't be low end entry level models. They will be higher end models to give owners of upper tier FF RF cameras and lenses an option to use a tough-as-a-tank, fast-handling APS-C camera for specific use cases that call for extra reach with their RF lenses, much like the 7D did for the EF line.
The xx0D/Rebel models (they are only marketed as "Rebels" in North America) have pretty much already been replaced by EOS-M cameras in terms of sales volume everywhere except North America. The xx00D/Rebel models are the bargain basement budget models that are mainly sold in world areas where the market doesn't contain enough buyers with the means to consider the EOS-M line. Many of the xx00D models aren't even available in North America, Western Europe, and Japan.