7 month not using both arms equally?

Since eating this past month, I’ve noticed she uses her right hand a little more. She uses both but definitely favors the right a little more. Shes also kinda always bangs her right arm like she’s slapping the ground or table, she’s seven months and i have videos of her doing it at 4 months as well. I kinda shrugged it off because she would only move her left leg and bang it during feedings around 4 months so I thought it was just a weird thing babies do. I have no concern with her legs because she equally moves both and all that but it’s her right arms that she will hit/flap a few times and stops and will randomly only do that with the right arm only. She will laugh and smile during it. She’s been a thumb sucker since she was 4 months old and only sucks her left thumb, so she definitely uses both but the right gets more play time lol. She reaches with both arms but if I let her she would only reach for toys with the right. She will hold and play with her left just would rather the right. Should I be worried? Since noticing I’ve been helping her to try to make sure she’s using both equally but I know there’s shouldn’t be a hand preference for a long time. She has an apt Wednesday but hoping someone could calm my nerves a little before then lol