I wouldn’t be surprised if I fell into that first level, I’ve spent much of my life trying to decode what people actually mean.

It’s slightly risky asking for moderate accomodations, so I might not try it for the first time on a job I desperately wanted, and an agency or small place is more likely to agree than a big corporate. I’d ask them beforehand, I think it would be too awkward and unexpected if suggested during the actual interview.

I’d make it a casual request by email when the interview date is confirmed. E.g. “I sometimes find interviews stressful, would you be open to visiting a local cafe? I completely understand if that’s not possible”. It could be worded better, but I wouldn’t be put off by that. Coffee interviews are a thing, and I like them - I get to expense a nice coffee! I’d pick a quiet place with good seating.

However, unless you do find it hard to be in an office at all, I’d want to make it clear during the interview that I’m normally fine with offices, so they don’t get the wrong impression (that you’ll refuse to work in an office) and I also wouldn’t dwell on it. They’ve made an accomodation, so they’ll expect you to be more relaxed. If you’re still visibly stressed, that might be a red flag.

Anyway, I’m rambling now, but I do feel for you, it’s very stressful.