With MTV 2.0.0 being the first generally available release, it would be better to express the stability in the API versioning. According to https://kubernetes.io/docs/reference/using-api/#api-versioning, the beta level is more relevant, since our CRDs won't be removed in the future.
The fix should be part of build mtv-operator-bundle-container-2.0.0-4 / iib:72115.
Verified on mtv-operator-bundle-container-2.0.0-4 / iib:72115 MTV was installed with v1beta1, and then CRs like plan, migration were run using v1beta1
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 (MTV 2.0.0 images), 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/RHEA-2021:2381