I fully agree. Without expecting the light-hearted tone to provide anything kinky, the absolute void of tickling feels like they're really going out of their way to avoid it. It's particularly aggravating given that the princess is barefeet 80% of the time.
https://v2.mangapark.net/manga/i-tried-getting-back-to-my-sadist-girlfriend-who-hurt-her-hand-and-can-t-fight-back/i2510554
A short tickle scene in a Twitter comic.
I don't remember seeing this one on the thread so, just in case :
https://www.tenmanga.com/book/%26quot%3BMy+Princess%2C+You+Must+Die%21%26quot%3B+said+the+Female+Knight.html
Chapter 7
MC is stuck in a death & revival cycle, one of her death is by tickling