VMWare Workstation on Bare metal EC2 instance.

If you're experiencing issues launching VMs in VMware Workstation on a bare metal EC2 instance even after disabling the Hyper-V feature, there are a few things to consider:

1. Bare metal instances: You're on the right track by using a bare metal EC2 instance. These instances provide direct access to the underlying hardware, which is necessary for nested virtualization like running VMware Workstation.

2. Disabling Hyper-V: Disabling the Hyper-V feature is a good step, but it may not be sufficient on its own. There could be other Windows features or settings interfering with VMware Workstation.

3. UEFI/BIOS settings: In a typical on-premises environment, you might need to adjust UEFI/BIOS settings to fully disable virtualization features that could conflict with VMware Workstation. However, AWS does not allow direct changes to the UEFI/BIOS settings on EC2 instances.

4. Additional Windows features: Ensure that you've disabled all related Windows features that might interfere with VMware Workstation. This includes Device Guard, Credential Guard, and any other virtualization-related features.

5. VMware Workstation compatibility: Verify that the version of VMware Workstation you're using is compatible with the Windows Server version on your EC2 instance.

6. EC2 instance type: Double-check that you're using a bare metal instance type that supports the resources required by VMware Workstation and the VMs you're trying to run.

If you've verified all these points and are still encountering issues, you may need to contact AWS support for further assistance, as there could be specific configurations or limitations on the EC2 bare metal instances that are affecting VMware Workstation's functionality.

Remember that running nested virtualization in a cloud environment can be complex, and not all scenarios may be fully supported or perform as expected compared to on-premises setups.
Sources
windows server 2022 - vmware workstation and hyper-v are not compatible | AWS re:Post
AWS compute operations for the VMware administrator - AWS Prescriptive Guidance