If it is full, the Ionic might have to wait or use the outside lane show in this picture.
Which unlike a gas station, might be a significantly longer wait. Also unlike a gas station (or the setup I showed), if there is an open stall, you can easily get to it and use it regardless of where your charge port is.
But there is no doubt any such arrangement in the US would have larger spacing and longer cables to handle the CyberTruck, EV Hummer, etc. and other large EVs.
I would say there is plenty of doubt until we actually see it start to appear on a regular basis rather than an exception. I do think it eventually will happen, and as the OP said, the first company to make it happen (provided they also have reliable charging stations and reasonable pricing) will win. In the meantime, Tesla and others still seem to regularly cram stalls into regular parking spots with little or no space between them, except for the occasional stall that is actually set up nicely for a Cybertruck/Hummer, but usually only because they were trying to squeeze in one more stall into an awkward parking lot, so you wind up with a nice big stall or two, like this one in Gettysburg:
While even in the case of pull-in sites, we still get these kinds of things (St. George, SC):
And here's a fun one to figure out which stall belongs to you (Asheville, NC):
Now interestingly, this one would actually work well with charge ports placed in odd locations, but you'd technically be using the "wrong" pedestal, so the person on the other side might not be able to charge if they had a "different" charge port location than you.
And I shouldn't pick on Tesla. This is my local EA station:
They sort of had the right idea here, and this works pretty well for cars that have their charge ports within the wheelbase area, but not so much on a Tesla where the charge port is at the extreme rear of the car. We took our Model Y there to test our CCS adapter and no matter which cable or station (the one facing the spot or the one facing the other way) it was a challenge to get it working. We ended up having to pull the car forward quite a bit (and out into the travel lane) in order to plug in.
Meanwhile gas stations allocate huge amounts of real estate to their pumps:
Maybe they can get away with this because the throughput of gas pumps is much higher than charging stations (and, they pretty much have to given the variation of fillers being on the left or right side of cars). And they also have quite universally adopted covering the pumps with canopies, not just for convenience sake, but also for safety (notice all the fire suppression tubes in the canopy).