Comcast in Chicago itself has carried both versions for a few years now, but I think that only happened after WGN America became a basic cable channel rather than the national feed of WGN9 in late 2014.
I don't think any non-Chicago DMA cable systems outside those areas of southeast Wisconsin between Milwaukee and Chicago and, of course, Canada, carry WGN9 anymore. I believe even the cable systems in the far southwest corner of Michigan that carry the other Chicago stations carry WGN America rather than WGN9.