I/O Cards for Mac Pro 2019
What cards are available for use on the Mac Pro 2019 Computer, to add additional interface ports? I would like to know what cards are available to add additional Thunderbolt3 and Additional USB-A ports. Would these cards Add and Additional Channel for the Thunderbolt (I believe that there are 4 Channels on the Mac Pro 2019, can additional channels of Thunderbolt be added view a particular PCI cards?