No, OP is referring to the fact that the companies that are big enough to be subject to the EU DSA's rules about platforms are all American. So any fines handed down for violations of the DSA are exclusively to American big tech firms. The rejoinder is that the rules apply to everyone, it just happens that the companies that are subject are American.
There are European companies that are under the regulation as well.
The DSA is the part that applies to all companies in some way as well (things like the need for moderation and a way for people to reach you with complaints). The DMA is about the market and how to deal with monopolies.
No, it wasn't. The usb forum could have decided to use a lightning compatible standard, but there were problems with it.
Besides, apple are one of the decision makers in the usb c standard, the legislation mandated a standard, but not a specific one, just the same one for all, and this forum which includes apple decided to go with usb c https://www.usb.org/members
There has been maybe two dozen different barrel plugs widely used over the last two decades, and "12V" and "20V" were already a de-facto standard for laptops with 2S and 3S batteries respectively (there was some artificial segmentation like 18.5V, 19V, 19.5V, 20V, etc. but they are all within tolerance range). I have not seen a male laptop; they are always female, being the "receiver" of the power.
That leaves out all the "what is a computer?" devices that had all sort of plugs that wouldn't be barrel: tablets, chromebooks, raspberry pi, e-readers etc.
Same for all the smaller dedicated devices (audio recorders, camera, controllers etc.)
Those didn't go the barrel plug route in the first place to allow for charging through the same port, and would have been a loophole if barrel was mandated. USB-C was honestly the only option that made sense IMHO.
Most of those used either USB or a barrel plug depending on their size.
raspberry pi, e-readers
USB.
Same for all the smaller dedicated devices (audio recorders, camera, controllers etc.)
Many of those use smaller barrel plugs, appropriate for their lower voltage.
The main problem with USB-C is the tiny fragile connector (search for images of "bent USB-C"), and the fact that it's a standard that tries to be what should really be a bunch of separate standards. It's hard to get a barrel plug wrong. It's too easy to get USB-C wrong, and cause damaged devices:
Otherwise I don't see any other rule that would ask the foreign company to move most of it's workforce and production capacity.