Full support for vSphere 8.0 is available starting with Veeam Backup & Replication 12.
See KB2443: Veeam Backup & Replication support for VMware vSphere
Veeam's RnD team has performed extensive testing with Veeam Backup & Replication 11a P20220302/P20230227 and has determined that it is functional with vSphere 8.0; however, the following limitations apply:
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