It’s in the closures list.
Did you already read this topic?
https://www.waze.com/forum/viewtopic.php?f=718&t=102678
That makes it even easier for us to give road closures to Waze 
Hi Stefaan,
I was not aware about that. I will check again to understand how to work with.
I checked the segment but I don’t see the temporary closure in the restriction.
Is it normal?
No, we have to wait untill Waze has set the road closure. Only L4+ editors can fill in a sheet that Waze reads to implement road closures. You’ll see soon a closure in the app.
The timebased restrictions in WME don’t give such a symbol and a red-white line on the segments which are closed. That’s why we use this sheet. We use it since March or April this year.
Waze is working a system where road closures are implemented in WME (but we don’t know yet when or what it looks like…)