Based on the search results, the answer is no, the KFC survey reward cannot be transferred to someone else. Here are some relevant points from the sources:

According to the KFC Canada website, the rewards or validation code cannot be transferred to someone else https://gab.com/kfcfood/posts/110756120791500991

The free chicken voucher that you win in the MyKFCExperience survey cannot be transferred to another person

The survey reward cannot be redeemed for cash

You cannot transfer the offer to another person

The deal is not transferable to other persons

Therefore, it seems that the KFC survey reward is non-transferable and can only be used by the person who completed the survey and received the coupon or discount code