Horizon 7 supports creating desktops on a single host SDDC for proof of concept use cases.
VMware Cloud on AWS allows you to deploy a starter configuration containing a single host. The single host SDDC starter configuration is appropriate for test and development or proof of concept (PoC) use cases. Horizon 7 supports creating full clones and instant clones on a single host SDDC for PoCs.
Do not run production workloads on a single host SDDC. Delete any desktop pools created for PoCs before scaling your SDDC to a full production SDDC.
For single host SDDC limitations, see "Deploying a Single Host SDDC Starter Configuration" in VMware Cloud on AWS Product Documentation.