How transparent are apps when displaying bookmaker margins, and do users even want to know their value?

I also sometimes wonder how transparently the 1xbet app in pakistan displays the margin. I've noticed for a while that it can vary across different lines, and sometimes it's completely unclear where this difference comes from. I'm also wondering if there's a way to accurately verify this or at least understand the logic behind the odds. For now, I'm relying solely on my own observations and comparing several matches in a row. In any case, it would be great if future apps made this more clear, eliminating the need to guess.