To answer your main question, here's a link to the UEM install guide via VMware Docs (First page has preparation points, etc. - they are getting pretty good with adding that lately):

https://docs.vmware.com/en/VMware-Workspace-ONE-UEM/2302/UEM_Installation/GUID-AWT-INSTALL-INTRO.htm...

That should be accessible even without a VMware account, but you might find more in the community if you login with a VMware account.

On a side note - why only Server 2019?  That server is EOL in Jan 2024 (meaning less/no support, security patches).  I would advocate to jump to MS Server 2022 since you're doing a full rebuild anyway.  But I understand that may come down to licenses, etc.  Still - worth asking to get ahead versus just catching up to be in the same position you're in with 2012R2 right now.