What to run
Use DNS Lookup. DNS Lookup is DNS-over-HTTPS from the browser and does not follow CNAMEs.
How to read the result
CNAME data is the target name, not an IP.
You still need A/AAAA on that target.
A CNAME beside other records at the same name is invalid; the page showing only the CNAME is the clue.
What to open next
Use DNS Lookup for A and AAAA on the target.
Open SSL Expiry Checker on the original hostname, because the certificate is for the name, not the target. That result is from Cloudflare.