Don't do it! You can't hook an external monitor to this disaster without having it overheat due to a bad graphics driver for the Radeon dedicated CPU!
Here is a 75 page long thread about it:
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(2019) 16" is HOT & NOISY with an external monitor! :(
I received a base 16" today and am disappointed because it get's as hot as my 2017 with an external 4K monitor. Is anybody else experiencing the same issue? I always work with external monitors and running on high resolution and this heating performance is upsetting. It's not cooler than the...forums.macrumors.com
FIX THIS APPLE AND AMD!
I looked at that thread, and there is a pretty simple workaround as long as you’re running in clamshell mode (MacBook Pro shut). Take a look at page 75, there are some happy users verifying it works.