Destiny is looking for this one! This one sounds pretty great, especially for the twist at the end, so if you hate spoilers, heed the spoiler alerts.
She asks:
Hi Maryse
I hope you’re well. I’m looking for a book that I read in 2019 or 2020.
It’s about a girl who lives in Paris with her parents and her brother. According to the girl she is the least favorite sibling her parents don’t like her and she wasn’t liked at school either as a result she doesn’t have any friends besides her brother (who is more popular than she is).