If there's a dispute then a monorepo makes things easier because all interested parties have a complete global view of the entire change. In a multi-repo setup

If there's a dispute then a monorepo makes things easier because all interested parties have a complete global view of the entire change. In a multi-repo setup, one change becomes many commits and everybody sees only their piece of the jigsaw puzzle. It does depend on everybody being adults and behaving sensibly; unfortunately there's no technology that can solve that problem.