About Code Review Assignment

Why am I limited to choose only 3 members of the team to be assigned to review the pull request?

What happens if I want 4 members? Does it make sense at all?

We were very happy to see this feature, but when we clicked on enable auto assignment, we noticed that it limits us to see max 3 members for the review.

Without CODEOWNERS, is there a way to assign more than 3 members to review the pull request?