After years of lurking, I made some posts this year here. Here is what my Google Analytics and Substack traffic from HN shows:
51% US
5% United Kingdom
4% Germany
3% Australia, Canada, India
The rest are primarily European countries, with Sweden, Denmark, France, and Spain leading the way.
* Most people here use ad blockers. I imagine this data is incomplete and would reflect the mobile portion of the users. I don't log IP addresses.
I think biggest issue is that you'll get a certain sub-segment of the HN audience, even if many use ad blockers. For example, all your latest submissions seems to be about AI/LLM, career growth and product engineering, probably someone submitting stories in other themes will get different data.