The openshift-ingress-operator uses the resourcegrouptaggings API to find the zone that has the desired tags. However, in AWS C2S regions, that API is not available. Instead, the openshift-ingress-operator needs to get tags via the route53 API.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Moderate: OpenShift Container Platform 4.7.0 security, bug fix, and enhancement update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2020:5633