Goodreads Librarians Group discussion

Hi, could a Goodreads Librarian please add the following books to series?

Series name: Whispering Hollows
Author: Suzzie Mac

Book 1: Tali & Milo
ISIN: B0FVGF3B4S

Book 2: Rafi’s Rhythm
ISIN:B0G4R62C73

Series name: Liam's light-up adventures
Author: Suzzie Mac

Book 1: Liam & Glowbug
ISIN: B0FFSG1XYK

Thank you very much!

Per GR policy, a series has to have shared character and/or take place in a shared universe. I can't tell from the descriptions if that's the case here. Can you clarify what makes this a series?