I went to one of the local zoos here in the Netherlands and for most parts it was great, it was nice and quiet, plenty of space.
Only a themepark is something different. There is less roaming around. At the theme park I visited last week (where they are at 30%), the queues for the big coasters were constantly between 45-80 minutes. The limited capacity on the rides kills every feeling of a park being 'quiet'.
When you make your decision for a ride, there is officially no option to leave the queue, cause you can't keep your distance when you have to pass people on the way out. Same with evacuations, today one of the rides had a major breakdown, it took a while before the queue was safely evacuated.
A week or so ago, I had a peek at the
Disneyland Shanghai app (never removed it after my visit two years ago
) and saw a 180-minute queue for Soarin, which is normal during the summer season.
So if you go to any themepark after reopening, I would prepare for regular queues.