I have bought multiple domains (io, org, eu, cloud) for my domain name. The IO domain is successfully registered with netlify via netlify DNS as the primary domain.
However, I face problems with the others. For eu, cloud the HTTP://mydomain.eu or HTTP://mydomain.cloud works (i.e. redirects to https:mydomain.io) - but HTTPS is never delivered for eu and cloud and runs into a timeout.
Interestingly for org I run into a cert warning even for HTTP://mydomain.org SSL_ERROR_BAD_CERT_DOMAIN
Sure - here you go: dataweeder.[io, org, eu, cloud] – for now it is only hosting a dummy theme (still).
I just deleted the other (non IO) domain aliases and re-created them. For eu and cloud it seems to work fine now. org is still showing some problems with the SSL validation.