I have a Kenko tokina 1.4 teleconverter. When attached to 150-600mm C sigma lens and camera switched on, it shows Err01. However if the electrical contacts of the teleconverter are blocked with a tape the lens and teleconverter operates Manual. The same teleconverter works allright with a canon 70-200mm L lens with autofocus options. Tried all techniques to overcome Err01 error. Did not succeed. So which brand of 1.4 teleconverter offers autofocus.
The simple answer is: the one that the camera company makes.
For example, a Canon TC is guaranteed to work with Canon bodies and appropriate Canon lenses.
But, once you go to third party (Kenko, Sigma, etc) lenses or TC's, the guarantee is gone. The specifics of why this is get into the electronics and technology baked into the lens, TC, and camera - but the end result is that you should only ever expect a lens or TC to work with a body if the manufacturer says it will. (For example, if Kenko says their TC works with 60D and 70D and 70-200L, but they're missing the 80D or Sigma lenses on their approved list...then you have no evidence that their TC will work with either that body or lens).
TLDR; there is no list of autofocus approved TC's. There is only the TC, and it's approved camera body and lens combinations. If you go outside of those rec's - you're in uncharted territory. Things may still work, but don't be surprised if they don't.