However, it's important to consider the meaning you want to convey. "Incidentally" usually introduces a piece of information that is not directly related to the main topic of the sentence but is worth mentioning nonetheless.
Here are some examples:
Correct:
* "We're having a party next week. Incidentally, have you seen the new movie?"
* "I'm going to the store to get groceries. Incidentally, could you pick up some milk on your way home?"
Incorrect (unless the meaning is intended to be sarcastic):
* "I love dogs. Incidentally."
In this case, the sentence feels incomplete. It sounds as if there is more information to be shared, but it is left unsaid.
Conclusion:
While "incidentally" can be used at the end of a sentence, it's crucial to ensure it fits within the natural flow of the conversation and doesn't leave the reader or listener feeling confused or unsatisfied.