welcome to the club brother!
from what I’ver read the only solution for the moment is creating different groups and showing them dynamically, a bit cumbersome
→ Horizontal column centering of repeating groups - #2 by FJP
I read about inserting javascript code with Toolbox but personally didn’t work for me, you can read about it here
→ Centering repeating group elements
let me know if it works or find a way to do it 