No Canon hasn't released a battery grip for the Digital Rebel T8i/ EOS 850D/ Kiss X10i. The camera wasn't designed to be used with a battery grip. I also don't recommend using a 3rd party grip. Using one on a camera body that was not designed to use one. Will cause problems including damaging the camera and voiding your warranty. No "Rebel"/ "Kiss"/ EOS xxxxD or EOS xxxD has one available. If you want a camera compatible with a battery grip look into the xxD, xD or a compatible EOS R series camera. They can use a battery grip. If you do look into a new camera look into the EOS R series mirrorless camera. The RF Mount is the future NOT the EF, EF-S or EF-M/ EOS M Mounts.
-Demetrius
Current Gear: EOS 5D Mark IV, EF Trinity, EF 50mm F/1.8 STM, EF 85mm F/1.8 USM, 470EX-AI & 600EX II-RT
Retired Gear: EOS 40D & Sigma 17-50mm F/2.8 EX DC OS HSM
