[tingle]

Between 2019 and 2020, I've created a few free one-time ProtonMail accounts, which I used for creating throw-away Apple IDs.

In fact, I just created one to verify. It's still possible. See for yourself:

user: [e-mail]

pass: testdonotuseforseriousstuff

All I had to do was to solve a captcha with bicycles in order to prove I was human. And the dialog for recovery e-mail / phone had a "Maybe later" button.

I live in Switzerland, maybe the impossibility of anonymous account creation is a legal issue in some countries ?

[flotzam]

Did you use Tor Browser though? They've been blocking that during signup for a long time now

[tingle]

No, I didn't. And I just tried with Tor Browser, but the captcha option is not available.