It would be nice to be able to subscribe and get a weekly e-mail. Sure, I check out HN but I might miss your posts anyway and it's a good funnel for your private newsletter!
Newsletters aren't a great fit for HN in general, either, the same way that a magazine or a newspaper or a blog home page in general don't make great submissions. There's rarely anything interesting to say about them at that level, so it's much better to link to a specific article from the newsletter or magazine or blog, etc. Lists in general don't make great HN submissions for the same reason: https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor...
I hope it's clear that I'm not criticizing this newsletter at all, and that interesting specific articles from it are fine to submit. (Though I've noticed with the new wave of newsletters that it's sometimes technically hard to link to specific content from them. Not sure what's up with that.)