Easier checking of DMARC records?

[nielsbom]

DMARC records often (always?) reside on a subdomain like _dmarc.example.com.
Using this dns-lookup we can look up the DMARC record: https://dns-lookup.jvns.ca/#_dmarc.example.com|txt
But it's a bit cumbersome having to do that for one specific record.

Would it be possible to extend this tool to also check the TXT record for the _dmarc subdomain automatically?

I've tried to run this project locally but I'm not familiar with golang or the ecosystem so I got stuck :-)