I am a huge fan of not wasting my kid's time with what I consider to be "fluff days". In the past if they have asked to not go I always said yes. They have not always asked though as some of those days are actually a fun school day they looked forward to.
I guess I don't see it as a waste of time. It is technically a school day and students are expected to go to school on school days. (I will admit that I am totally a "rule follower" so if it were me, I would not be able to stay home, I would feel to guilty to enjoy it LOL.) If she stays home she probably sleeps, watches TikTok. That, to me, is a waste of time.
I see both sides though and will most likely let her decide for herself.