ICANN accredited domain registrars (so any registrar selling generic TLDs like .org, .com, .design etc) have contractual obligations related to technical abuses like phishing, malware, and botnets, insofar as they intersect with a domain name.
Content/expression related harms are outside of ICANNs bylaws and any obligations related to what a domain points at are not from ICANN, but from the laws in the jurisdiction in which the registrar operates. This is generally good. There is no global standard for acceptable limits on expression, with the possible exception of CSAM which is illegal everywhere.
Requiring domain registrars to arbitrate what content should be accessible via the DNS is perilous.
Content/expression related harms are outside of ICANNs bylaws and any obligations related to what a domain points at are not from ICANN, but from the laws in the jurisdiction in which the registrar operates. This is generally good. There is no global standard for acceptable limits on expression, with the possible exception of CSAM which is illegal everywhere.
Requiring domain registrars to arbitrate what content should be accessible via the DNS is perilous.