If one part has collapsed then the risk is that it could happen elsewhere for the same reasons. I reckon the whole stand (or at least the roof) will be demolished and rebuilt.
Yes, the roof appears consistent so along with rebuilding of the this part there could well be extensive remedial/strengthening works to the roof throughout (i would be very, very surprised if there was any demolition).
Will be interesting to see if it is a design or construction defect.
In either case, very concerning and thank goodness no one was in the stadium at the time. Could have been horrendous.
I was in that stadium for a Europa cup game a few years ago. Nice stadium, in a nice town.
Interesting fact .. Alkmar is famous for its cheese market in the main square
Also been to a Europa fixture here, they played Astra in 2015. The stand behind the goal had a Scottish section in the concourse with memorabilia from lots of teams including Hibs. Their ultras (situated directly behind the goals 🤔) seem to have an affiliation with the Huns (had Union jacks and a No Surrender banner) but they had the whole stand bouncing and no horrible songs so will let them off.