DNS over HTTPS cloudflared

So I have no issues running Cloudflare DNS & Google DNS simultaneously over HTTPS using Cloudflare's cloudflared tool; however, I tried using the "DNS-over-HTTPS" endpoint on its own and also appended a string to indicate the device.

In both cases, no DNS resolution happened, no indication in the configuration analytics on your site that any requests were made. There were no issues in the logs for cloudflared either. I could potentially try capturing packets to see if the requests are being made but I feel like there is something off on my configuration with either of the following in the /etc/default/cloudflared configuration file:

CLOUDFLARED_OPTS=--port 5053 --upstream https://dns.nextdns.io/<endpoint>

CLOUDFLARED_OPTS=--port 5053 --upstream https://dns.nextdns.io/<endpoint>/pihole

Thought I'd share/ask since was curious if I could use your upstream DoH server to potentially add another layer to my already pretty robust home network security.