I wouldn't bet on the Switch dock working with any non-Switch hardware since Nintendo didn't really care about following USB specification there, but you can easily get a third-party USB-C hub that works with Switch and which should work with Deck too (and also other stuff such as laptops or phones like Librem 5 as well).
Speaking of: I wonder if it'll work with a Switch dock? Probably would require some physical modification of the dock itself, but it'd still be neat if they're interchangeable and I can stick either one into any dock.