Yup, that's always the answer. The customer doesn't give you the full specs, complains about why this isn't available already. When you deliver your proposed solution it turns out they had some extra physically impossible to fulfill requirements. Reminds me of "The Expert" skit.
The customer is used to being able to plug all of their stuff into a lot standard wall outlet and their headphones in any standard 3.5mm jack so it's not at all surprising that they don't automatically provide all the specs. And frankly customers shouldn't have to care. USB engineers and PMs completely botched the design of USB-C.
I think it’s interesting how a lot of knowledgeable people will chime in on here on certain feature compromises and limitations with USB-C and it always sounds reasonable in isolation. But you only have to take a step back and look at the specification in its totality to see that it’s a shit show. It’s like this thing was designed by a bunch of subcommittees and no one had a clear understanding of or oversight over the big picture.
Well, that exists, it's called Thunderbolt 3 (or 4, since PC makers decided to try to get away with a shitty half-version of TB3).
And the cable exists too, but you have to pay through the nose for it, and people expect all cables to be $5 at Monoprice.
Turns out that 40Gbps and supporting any and all monitors at the same time and 100W of power isn't an easy spec.
Everyone mocked Apple for going with Thunderbolt so early, but it turns out they had it exactly right, just like they did with FireWire, another standard that was super-fast for its time and also included robust power delivery.
Short answer to the grandparent: buy a certified Thunderbolt 4 cable. They have clear markings (a Thunderbolt logo, along with the digit 4). They are backwards compatible with Thunderbolt 4, Thunderbolt 3, USB 4, USB 3.2/3.1/3.0, USB-C Gen 1/2, USB 2.0 and can charge 100W.
The customer assuredly cannot do that for a standard wall wallet.
The original poster said they wanted to plug in an iPad and phone for charging. The right comparison would be a customer buying a power strip, plugging in two space heaters at the same time, and wondering why the circuit breaker triggers.
The promise of usb (any version) is that you could have one port that everything plugs into. Usb-a isn't perfect in that regard, but it's mostly there. Usb-a backslid considerably on that promise.
