If they would use DNS over HTTPS, then yes they could

When I was at university the network in the dorm actually blocked access to Google's DNS servers so I had to route 8.8.8.8 to their DNS servers. Chromecast worked fine after.

I cant wait until 8.8.8.8 becomes the "address" of the local DNS server as more and more people start to hijack it. We had to hijack it at my old work because some random vendor's devices were hardcoded and we needed them to see our internal names.

I can confirm that it works fine and haven't had a device complain yet.

I'm actually surprised that more networks don't route the addresses of all the public DNS servers to their resolver.