Hi Van_Oldham,
Thank you for posting in the Apple Support Communities. We understand you would like to know if you would be able to connect 3 displays to a 16" MacBook Pro.
"Simultaneously supports full native resolution on the built-in display at millions of colors and:
- Up to two displays with 6016‑by‑3384 resolution at 60Hz at over a billion colors or
- Up to four displays with 4096‑by‑2304 resolution at 60Hz at over a billion colors
Thunderbolt 3 digital video output
- Native DisplayPort output over USB‑C
- VGA, HDMI, DVI, and Thunderbolt 2 output supported using adapters (sold separately)"
You'll find additional information here: MacBook Pro 16-inch - Technical Specifications
For specifics regarding the hub you intend to purchase, you'll want to speak directly with the manufacturer, or consult their support options.
Cheers!