VMware vSphere ESXi 8.0
VMware vSphere ESXi 7.0
This is expected as reverting to the earlier 7.0 version is not possible after upgrading to ESXi 8.03d from ESXi 8.03b.
The only option possible here would be to revert to the last 'version' which would be 8.03b.
Please refer to Reverting to a previous version of ESXi 6.x, 7.x or 8.x.
Reinstall ESXi host. Please refer to ESXi Installation and Setup.