Even without having this be “official,” there are a few requests that could be combined to make this happen:
Obviously there are space limitations that could make it simply unfeasible, but an absolute dream version of this might be an expansion card with 3 USB ports: An internal USB-A one for that one pesky dongle we all have, a slightly sunk-in USB-C port with “under-laptop” access for things like a Yubikey (or if space allows, maybe a slightly sunk-in USB-A port to work with the Yubikey 5 nano, since that puts the touch sensitive spot on the side of the laptop rather than the bottom), and a regular USB-C port for standard usage (even if it has some limitations, I’d happily give up some of the benefits of our ports if I can have a dongle a Yubikey in the same module).