Just an fyi, it's good to setup firewall redirection from suspicious devices as well.

For my Roku I have setup a redirection for all DNS port queries to my pihole as some app developers are getting wise to this and using their own DNS.

It won't be long until they encrypt this traffic and lock us out completely though.

Yes, that works! I have a Samsung Frame + PiHole. Incredible amount of network requests are blocked now.

i tried blocking DNS or whitelisting and you probably see that large amount of blocked requests because it tries like every second if you refuse the response.