I tried researching this a bit and you are right that it's not a Comaps-specific issue but more with the general OSM ecosystem.

It seems to be a chicken-and-egg situation in the sense that there are ways to tag temporary closures but they are not recommended for short-lived data because many apps use data offline and have long update cycles.

I'm referring to this bit in the page on key:construction

As OSM data is often used offline (and therefore may be several months old), only tag construction sites (particularly roads and railroads) if they are planned to be closed for at least six to nine months.

There is some work being done at Google Summer of Code 2025 to add road closures and more real-time events that might impact navigation. I'm looking forward to see if it pans out.