Technically yes it can, but at one half of one percent. So, if your total oil weight is say 2lbs, you can use a little less than one teaspoon in your batch, or 0.16 ounces.
Any more than that and it has the potential to be highly irritating. Having been burned by someone that overused an FO with cinnamon, I would urge you not to exceed the recommended limits. You may want to consider an FO that has a higher usage rate if you just like the scent.
Is that leaf or bark? I can't remember...But, the leaf is safer than the bark. I use .5 oz ppo. and I do blend it. I have an Orange Spice soap with clove, cinn, and orange.
But leaf and bark smell entirely different. And if you are looking for true cinnamon aroma without smokiness, bark is what you want. I use no more than 0.25 oz PPO, and it is not irritating.