dns over tls, how to test

hello and thanks for reading this.
I have setup dns over tls ,as per https://www.netgate.com/blog/dns-over-tls-with-pfsense.html
at the end, it states
"You can confirm if DNS queries are being sent over TLS by performing a packet capture on the WAN interface."
is there an easier way to confirm dns over tls or can someone point to me a webpage explaining how to do such a packet capture.
thanks much,
david

I think I have figured out a easy way.
goto https://dnsleaktest.com and run the test, for me I got for isp "Optimum Online".
then i made the changes at https://www.netgate.com/blog/dns-over-tls-with-pfsense.html and run the test and again and this time I got for isp "Cloudflare".

so do you think my way to testing is a good way?
thanks,