Make sure it can support 100W (that one only goes to 85W).
Plug one end into your PC, one into a wall charger, and one into your soldering iron.
If you want to solder such a thing yourself, there's USB-C PD data/power splitters sold in various places (it needs to be smarter than just connecting pins, since it needs to intercept the power negotiation), but I haven't yet found a part that is advertised to handle 100W.
The hub has a bunch of female ports, and one male USB C port.
The male USB port is the only one that provides USB PD charging output, and it is also the only port that can be used with a USB host machine.
This means that it cannot be used to change settings on the iFixit iron with a computer and give give the iron enough power to heat up. It's not an improvement at all over a regular computer that also cannot do both of these things concurrently.
It looks like a lovely hub to keep on a desk for plugging in a laptop, but it is broadly limited to doing exactly that.
https://www.amazon.com/dp/B07XF5489G
Make sure it can support 100W (that one only goes to 85W).
Plug one end into your PC, one into a wall charger, and one into your soldering iron.
If you want to solder such a thing yourself, there's USB-C PD data/power splitters sold in various places (it needs to be smarter than just connecting pins, since it needs to intercept the power negotiation), but I haven't yet found a part that is advertised to handle 100W.