I'll try to help you,ischaid
According to Apple, it depends what MPX graphics module you have in there. Of course, the 2019 Mac Pro is mighty new...as in very new..... and of course, I haven't seen one in person, and I can't afford to own one.
but here we go: and I got this info from Apple's official website for the Mac Pro (linK)
https://www.apple.com/ca/mac-pro/specs/
If you have the Radeon Pro 580 X, it does have 2 HDMI 2.0 ports on the card itself
if you have the W5700X, it has 4 thunderbolt 3 ports and 1 HDMI 2.0 port
if you have the Vega II, it too has 4 thunderbolt 3 ports and 1 HDMI 2.0 port
If you have the Vega II Duo, it has 4 thunderbolt 3 ports and 1 HDMI 2.0 port
the only info I have to go on is that which has been officially released or which has come from a trusted news source, such as
appleinsider.com
I don't know who you talked to at Apple Support, I am just a Mac user here, same as you, same as everyone else here.
we get our info and news from the same sources. Apple does not post or reply here....
Anyways, the lack of HDMI is not a huge problem. whatever video output the new Mac Pro offers, there'll probably be an adapter to convert it to HDMI or whatever else you want....
I know what I'm missing (apart from my marbles) ..... the ability to buy a new Mac Pro...apart from me winning the lottery
it's never gonna happen
hope this helps you.....
john b