What is the total number of USB ports available on the Xbox Series X console?
There are 2 high speed USB A ports on the back of the console. There is an additional USB A port at the front of the console bringing it to 3 USB ports in total available on the console.
If this is not enough, you will be able to use a USB splitter to create some additional ports for connecting items. It will not be the same for powering lots of things but it will give you some extra room for connecting addons if you have a need for this many.