I mean even if it's not Actinic Keratosis, it is clearly something similar. It may not be caused by sun damge but the cells seem to be reacting similarly. Most of the pictures I see are also affecting the same area of the lips as us. So perhaps it could at least be treated similarly.
Actinic keratosis is the only condition that we have seen, that is common on the lips, that even resembles our condition.