Heh, here you go: http://mxmap.be https://mxmap.ch/ https://kommune-epost-norge.netlify.app/ for Norway and https://swedish-mail-dependency.netlify.app/ for Sweden.

France even has an official map of this kind, with publicly visible recommendations: https://suiteterritoriale.anct.gouv.fr/conformite/cartograph...

Disclaimer: I made mxmap.be after seeing Swiss ant Dutch counterparts. I did not look at MX records only but also at EHLO replies, SPF and DMARC records and at fronting services.