Adobe updates the profiles on a regular basis, however, there is no date announced for support for specific devices. From my experience and without having advance information, it takes one to two versions for Adobe to recognise new hardware in their raw development programs.
You should look when the lens was available and then when the last update release was and extrapolate that.
Adobe never says when something will be included; however, most every release Adobe adds a dozen or two lens profiles to LR/ACR, so be patient. If it's a new lens for an important camera from a mainstream brand, it'd likely be a priority. This particular lens is $3000 so they probably would need to acquire a loaner from Canon as opposed to just buying one.