So for OVH I’ve got the EU side, but I’m not flagging that you could spin up in their US or Canada region by accident.
In effort not to create a large amount of work or overhead, I think the key concern is more what is considered sovereign - these large shops have core presence and edge presence. It is not uncommon that an edge use the features of the core which crosses countries; when I worked in a multinational, our Sydney DC was an edge to the Hong Kong DC core (think like a monitoring or backup system) so your data actually flowed through HKG pipes because Sydney is insanely expensive to have a DC in (size/space).
Spirit in my comment was more to that - spinning up in US by accident is a "given" to me, kinda obvious. An edge DC routing through a core DC in another country, well that's a different matter. Can be invisible to the end user.
If you’ve still got the registrar list you clicked through
ICANN has a nice page, lets you filter it by country or whatever. There are a million of them, and some of them "feel sketchy" but many seem like generic, boring registrars.
https://www.icann.org/en/contracted-parties/accredited-registrars/list-of-accredited-registrars
I then used the DNSPerf data to dig into that layer, tl;dr 90% (guessing) are US controlled. I actually found more out there than what's on this list but it's really comprehensive of the big players in the DNS space.
My "investigation" was all manual, dig through publicly available information and follow my nose. The DNS perf listing is actually how I even learned Bunny and Gcore existed.
https://en.wikipedia.org/wiki/Carmen_Miranda