Edit: USB-C only hubs. Everything I've seen is USB-C to USB-A/HDMI/Ethernet/Audio (though that resolves the above problem if the DAC is decent enough) There _are_ Thunderbolt docks (which this XPS 13 supports) which provide USB-C ports but they're pricey.
What do you mean? A quick search returns several options. Personally I have an all-in-one USB-C to HDMI/SD/USB-A/headphone/etc dock dongle thing, and it covers my needs.
There are a bunch of options for this, some more flexible than others, but options nonetheless.
I have a Dell XPS 2in1 from 2019 which only has 2 USB-C ports, however, I'm using a thunderbolt dock so I get a USB-C port back and a USB-C display port output on the back, have never tried connecting a device to it to though.
Anker also have some hubs with one USB-C input and one PD.
Although they're not USB-C only, I have two hubs that expose a USB-C connector (for data, not just PD). One HP USB-C Dock G5 and some random Chinese thing off Amazon [0]. They're both USB, not thunderbolt.
The HP is absurdly expensive, the second one is ok-ish (cost me €80). But they're both quite big, and the HP is heavy, so wouldn't be great to use at, say, a coffee shop.
They both have sound cards and a 3.5 mm jack. The DAC on the Chinese one isn't as good as the one on my HP laptop, but it's decent, no background noise or anything. Haven't tested the HP.
They're both able to power the computer through the USB-C port.
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[0] https://www.amazon.fr/gp/product/B09MTTZ36K/ref=ppx_yo_dt_b_...
Say what? I have one right here on my desk. You can get them for like $20 on Amazon etc.