I’m using the Family Filter here in Belgium too and also are having problems with using Waze.
I can search for streets, etc. But the map stays blank (and it keeps saying “looking for (or searching for) network”.
I can’t use the app, because it can’t navigate without a map 🙂
I ran the standard test on dnsleaktest.com and it resulted in 18.104.22.168 (dns-edge-europe-amsterdam.cleanbrowsing.org; Choopa, LLC)