The 2019 evaluation took them around 2 months to rebuild after the rerelease. I suspect they're now working on the free Hyper-V Server 2019.
You could mention feedback here on uservoice if desired.
https://windowsserver.uservoice.com/forums/295050-virtualization
Regards, Dave Patrick ....
Microsoft Certified Professional
Microsoft MVP [Windows Server] Datacenter Management
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