I have recently purchased the Samyang AF 14mm f/2.8 and the Samyang AF 85mm f/1.4 in canon ef mount. I have Lightroom classic CC & Photoshop installed but see no lens profile for either of these lenses.
Under Lens Corrections> Profile tab select Make> Samyang. Also make sure you have a raw CR2 file selected. There are no Samyang lens profiles for JPEGs. Both 14mm and 85mm lens profiles should be visible.