Earlier quoted context omitted.
Can you post your request and who is sent it to - with yours as a starting point I reckon a few of us can iterate to a good solution
Nothing fancy, and I sent it to the contact point they have in their privacy policy. You can find it on their websites (or at least I found it; in my case it was just an email but it will possibly escalate to snail mail). As far as contents goes - here it is, translated into English: I am a/an [OPERATOR] subscriber, identification data: (...) I would like to get a complete list of personal data that [OPERATOR] stores…
The right to access your data is Article 15 of GDPR. Section 1 lays out what they have to provide you. Part (b) of that is "the categories of personal data concerned." I'm no lawyer, but I take that to mean that they have to provide you with the complete list of processing they do.
If I were making this request, I would scrap the entire bullet-point list you wrote and say that I'm invoking my Article 15 rights to be informed of the categories of personal data that [OPERATOR] processes about me.
Relevant law text: https://gdpr-info.eu/art-15-gdpr/