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
TXT data is text, often in quoted chunks.
SPF is the record that starts with v=spf1.
Several SPF records on the same name are a misconfiguration.
Verification tokens are exact strings; compare them, do not "fix" them.
What to open next
None of these records are checked by Whois Lookup. Whois is RDAP: registrar, statuses, dates, and nameservers. It will not show TXT.