I know that it is possible to get SIM cards without registration in the UK or Czech Republic, unfortunately, this is not possible in the country where I live.

I bought my phone in an apple store with cash without KYC.

The thing is that I have this one phone, and even with eSIM, my phone has a unique identification number registered by the mobile operators (this IMEI), so they essentially see this number around my home, work, other places. Based on these patterns I could be easily identified. Solution could be to use multiple phones and eSIMs, but who would do that?