Not, by this metric, if they live in the same repo as the code. When they don't, they have the same problem as any strongly coupled systems maintained across multiple repos, or you are paying the cost of keeping the two uncoupled.
I think the monorepo question is complicated, but this is generally a strong element in the pros column. One exception to that is when you want decoupling for other reasons, the pressures of multiple repos can help motivate it in the day-to-day.
